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Schedule III (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,024,936,000 $ 977,074,000 $ 868,276,000 $ 1,138,378,000 $ 1,024,936,000 $ 977,074,000
Real estate assets, net, held for sale       (131,274,000) (131,419,000) (124,883,000)
Total accumulated depreciation       1,007,104,000 893,517,000 852,191,000
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,271,966,000 4,215,275,000 3,510,126,000 4,915,858,000 4,271,966,000 4,215,275,000
Development in process exclusive of land included in Schedule III       194,050,000 201,409,000 44,621,000
Real estate assets, net, held for sale       (340,581,000) (331,813,000) (334,722,000)
Total real estate assets       4,769,327,000 4,141,562,000 3,925,174,000
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,271,966,000 4,215,275,000 3,510,126,000 4,915,858,000 4,271,966,000 4,215,275,000
SEC Schedule III, Real Estate Accumulated Depreciation 1,024,936,000 977,074,000 868,276,000 1,138,378,000 $ 1,024,936,000 $ 977,074,000
SEC Schedule III, Real Estate, Federal Income Tax Basis       4,500,000,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, beginning balance 4,271,966,000 4,215,275,000 3,510,126,000      
Acquisitions, development and improvements 708,793,000 282,105,000 735,183,000      
Cost of real estate sold and retired (64,901,000) (225,414,000) (30,034,000)      
Real estate assets, ending balance 4,915,858,000 4,271,966,000 4,215,275,000      
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, beginning balance 1,024,936,000 977,074,000 868,276,000      
Depreciation expense 168,663,000 154,448,000 138,163,000      
Real estate sold and retired (55,221,000) (106,586,000) (29,365,000)      
Accumulated depreciation, ending balance 1,138,378,000 $ 1,024,936,000 $ 977,074,000      
Atlanta, GA - 1700 Century Circle [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 920,000     920,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,724,000     3,724,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,482,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       2,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,240,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,722,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,724,000     3,724,000    
SEC Schedule III, Real Estate Accumulated Depreciation 920,000     920,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,724,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 920,000          
Atlanta, GA - 1700 Century Circle [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 1700 Century Circle [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 1800 Century Boulevard [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 22,790,000     22,790,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 44,081,000     44,081,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,444,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       29,081,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       13,556,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,444,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       42,637,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 44,081,000     44,081,000    
SEC Schedule III, Real Estate Accumulated Depreciation 22,790,000     22,790,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 44,081,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 22,790,000          
Atlanta, GA - 1800 Century Boulevard [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 1800 Century Boulevard [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 1825 Century Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,039,000     5,039,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,606,000     15,606,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       864,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       303,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       14,439,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,167,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,439,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,606,000     15,606,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,039,000     5,039,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 15,606,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,039,000          
Atlanta, GA - 1825 Century Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 1825 Century Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 1875 Century Boulevard [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,878,000     4,878,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,355,000     13,355,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       8,924,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,431,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,355,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,355,000     13,355,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,878,000     4,878,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,355,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,878,000          
Atlanta, GA - 1875 Century Boulevard [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 1875 Century Boulevard [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 1900 Century Boulevard [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,793,000     2,793,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,515,000     5,515,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,744,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       771,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,515,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,515,000     5,515,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,793,000     2,793,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,515,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,793,000          
Atlanta, GA - 1900 Century Boulevard [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 1900 Century Boulevard [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 2200 Century Parkway [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 9,069,000     9,069,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 18,998,000     18,998,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       14,432,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,566,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       18,998,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 18,998,000     18,998,000    
SEC Schedule III, Real Estate Accumulated Depreciation 9,069,000     9,069,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 18,998,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 9,069,000          
Atlanta, GA - 2200 Century Parkway [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 2200 Century Parkway [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 2400 Century Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,532,000     5,532,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,136,000     13,136,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       406,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,730,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       406,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,730,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,136,000     13,136,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,532,000     5,532,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,136,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,532,000          
Atlanta, GA - 2400 Century Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 2400 Century Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 2500 Century Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,577,000     5,577,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,751,000     14,751,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       328,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       14,423,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       328,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,423,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,751,000     14,751,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,577,000     5,577,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,751,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,577,000          
Atlanta, GA - 2500 Century Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 2500 Century Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 2500/2635 Parking Garage [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,592,000     1,592,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,317,000     6,317,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,317,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,317,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,317,000     6,317,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,592,000     1,592,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,317,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,592,000          
Atlanta, GA - 2500/2635 Parking Garage [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 2500/2635 Parking Garage [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 2600 Century Parkway [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 7,819,000     7,819,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,641,000     14,641,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       10,679,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,962,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,641,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,641,000     14,641,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,819,000     7,819,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,641,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,819,000          
Atlanta, GA - 2600 Century Parkway [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 2600 Century Parkway [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 2635 Century Parkway [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 11,767,000     11,767,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 25,782,000     25,782,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       21,643,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,139,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,782,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,782,000     25,782,000    
SEC Schedule III, Real Estate Accumulated Depreciation 11,767,000     11,767,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 25,782,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 11,767,000          
Atlanta, GA - 2635 Century Parkway [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 2635 Century Parkway [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 2800 Century Parkway [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 13,102,000     13,102,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 32,325,000     32,325,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       20,449,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,876,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       32,325,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,325,000     32,325,000    
SEC Schedule III, Real Estate Accumulated Depreciation 13,102,000     13,102,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 32,325,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 13,102,000          
Atlanta, GA - 2800 Century Parkway [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 2800 Century Parkway [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 50 Glenlake [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 10,569,000     10,569,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 25,997,000     25,997,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,500,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       20,006,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,491,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,500,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       23,497,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,997,000     25,997,000    
SEC Schedule III, Real Estate Accumulated Depreciation 10,569,000     10,569,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 25,997,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 10,569,000          
Atlanta, GA - 50 Glenlake [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 50 Glenlake [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - Bluegrass Valley Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,416,000     2,416,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       19,711,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (17,295,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,416,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,416,000     2,416,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,416,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Atlanta, GA - Century Plaza I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 5,171,000     5,171,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,048,000     14,048,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,290,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       8,567,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,191,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,290,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,758,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,048,000     14,048,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,171,000     5,171,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,048,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,171,000          
Atlanta, GA - Century Plaza I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Century Plaza I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - Century Plaza II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,154,000     4,154,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,918,000     11,918,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,380,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       7,733,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,805,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,380,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,538,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,918,000     11,918,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,154,000     4,154,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 11,918,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,154,000          
Atlanta, GA - Century Plaza II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Century Plaza II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - Federal Aviation Administration [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,015,000     4,015,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,800,000     17,800,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,196,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       1,416,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,188,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,612,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,188,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,800,000     17,800,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,015,000     4,015,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 17,800,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,015,000          
Atlanta, GA - Federal Aviation Administration [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Federal Aviation Administration [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - Henry County Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,023,000     3,023,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,010,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       13,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,023,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,023,000     3,023,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,023,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Atlanta, GA - Highwoods Center III at Tradeport [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 1,126,000     1,126,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,579,000     4,579,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       409,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       130,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,040,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       539,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,040,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,579,000     4,579,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,126,000     1,126,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,579,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,126,000          
Atlanta, GA - Highwoods Center III at Tradeport [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Highwoods Center III at Tradeport [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 5405 Windward Parkway [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 15,765,000     15,765,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 54,169,000     54,169,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,342,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       32,111,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       18,716,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,342,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       50,827,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 54,169,000     54,169,000    
SEC Schedule III, Real Estate Accumulated Depreciation 15,765,000     15,765,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 54,169,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 15,765,000          
Atlanta, GA - 5405 Windward Parkway [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 5405 Windward Parkway [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - River Point Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 391,000     391,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,712,000     13,712,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       7,250,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       3,913,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,549,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       11,163,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,549,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,712,000     13,712,000    
SEC Schedule III, Real Estate Accumulated Depreciation 391,000     391,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,712,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 391,000          
Atlanta, GA - River Point Land [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - River Point Land [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - Riverwood 100 [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 10,357,000     10,357,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 82,606,000     82,606,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       5,785,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       64,913,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (29,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,937,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,756,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       76,850,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 82,606,000     82,606,000    
SEC Schedule III, Real Estate Accumulated Depreciation 10,357,000     10,357,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 82,606,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 10,357,000          
Atlanta, GA - Riverwood 100 [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Riverwood 100 [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - South Park Residential Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 57,000     57,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       50,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       7,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       57,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 57,000     57,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 57,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Atlanta, GA - South Park Site Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,958,000     1,958,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,204,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       754,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,958,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,958,000     1,958,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,958,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Atlanta, GA - Tradeport Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 684,000     684,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       5,243,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (4,559,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       684,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 684,000     684,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 684,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Atlanta, GA - Two Point Royal [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 7,722,000     7,722,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 20,055,000     20,055,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,793,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       14,964,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,298,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,793,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       18,262,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,055,000     20,055,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,722,000     7,722,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 20,055,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,722,000          
Atlanta, GA - Two Point Royal [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Two Point Royal [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - Two Alliance Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 16,372,000     16,372,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 138,478,000     138,478,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       9,579,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       125,549,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,350,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       9,579,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       128,899,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 138,478,000     138,478,000    
SEC Schedule III, Real Estate Accumulated Depreciation 16,372,000     16,372,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 138,478,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 16,372,000          
Atlanta, GA - Two Alliance Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Two Alliance Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - One Alliance Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 11,405,000     11,405,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 148,256,000     148,256,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       14,775,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       123,071,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,410,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       14,775,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       133,481,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 148,256,000     148,256,000    
SEC Schedule III, Real Estate Accumulated Depreciation 11,405,000     11,405,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 148,256,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 11,405,000          
Atlanta, GA - One Alliance Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - One Alliance Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 10 Glenlake North [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,693,000     3,693,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 32,321,000     32,321,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       5,349,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       26,334,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       638,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,349,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       26,972,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,321,000     32,321,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,693,000     3,693,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 32,321,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,693,000          
Atlanta, GA - 10 Glenlake North [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 10 Glenlake North [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - 10 Glenlake South [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,468,000     2,468,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 30,351,000     30,351,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       5,103,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       22,811,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,437,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,103,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,248,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 30,351,000     30,351,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,468,000     2,468,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 30,351,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,468,000          
Atlanta, GA - 10 Glenlake South [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - 10 Glenlake South [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - Riverwood 300 Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 400,000     400,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       400,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       400,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 400,000     400,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 400,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Atlanta, GA - Monarch Tower [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 2,090,000     2,090,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 165,785,000     165,785,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       22,717,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       143,068,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       22,717,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       143,068,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 165,785,000     165,785,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,090,000     2,090,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 165,785,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,090,000          
Atlanta, GA - Monarch Tower [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Monarch Tower [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Atlanta, GA - Monarch Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,191,000     1,191,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 116,640,000     116,640,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       27,678,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       88,962,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       27,678,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       88,962,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 116,640,000     116,640,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,191,000     1,191,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 116,640,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,191,000          
Atlanta, GA - Monarch Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Atlanta, GA - Monarch Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Kansas City, MO - Country Club Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 117,945,000     117,945,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 300,863,000     300,863,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       14,286,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       146,879,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (198,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       139,896,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       14,088,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       286,775,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 300,863,000     300,863,000    
SEC Schedule III, Real Estate Accumulated Depreciation 117,945,000     117,945,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 300,863,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 117,945,000          
Kansas City, MO - Country Club Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Kansas City, MO - Country Club Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Kansas City, MO - Land - Hotel Land - Valencia [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,089,000     1,089,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       978,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       111,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,089,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,089,000     1,089,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,089,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Kansas City, MO - Park Plaza Building [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 3,713,000     3,713,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,636,000     10,636,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,384,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,410,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,842,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,384,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,252,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,636,000     10,636,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,713,000     3,713,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,636,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,713,000          
Kansas City, MO - Park Plaza Building [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Kansas City, MO - Park Plaza Building [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Kansas City, MO - Two Emmanuel Cleaver Boulevard [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,930,000     2,930,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,578,000     7,578,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       984,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,402,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,192,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       984,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,594,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,578,000     7,578,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,930,000     2,930,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,578,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,930,000          
Kansas City, MO - Two Emmanuel Cleaver Boulevard [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Kansas City, MO - Two Emmanuel Cleaver Boulevard [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Kansas City, MO - Valencia Place Office [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 12,519,000     12,519,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 36,816,000     36,816,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,576,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       970,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       34,270,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,546,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       34,270,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 36,816,000     36,816,000    
SEC Schedule III, Real Estate Accumulated Depreciation 12,519,000     12,519,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 36,816,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 12,519,000          
Kansas City, MO - Valencia Place Office [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Kansas City, MO - Valencia Place Office [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - 3400 Players Club Parkway [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,533,000     2,533,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,433,000     7,433,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,005,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       207,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,221,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,212,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,221,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,433,000     7,433,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,533,000     2,533,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,433,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,533,000          
Memphis, TN - 3400 Players Club Parkway [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - 3400 Players Club Parkway [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Triad Centre I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 6,467,000     6,467,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,539,000     17,539,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,340,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       11,385,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (849,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,663,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,491,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       16,048,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,539,000     17,539,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,467,000     6,467,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 17,539,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,467,000          
Memphis, TN - Triad Centre I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Triad Centre I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Triad Centre II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,634,000     4,634,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,817,000     14,817,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,980,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       8,677,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (404,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,564,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,576,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,241,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,817,000     14,817,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,634,000     4,634,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,817,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,634,000          
Memphis, TN - Triad Centre II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Triad Centre II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Atrium I & II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,245,000     4,245,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,773,000     10,773,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,570,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,253,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,950,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,570,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,203,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,773,000     10,773,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,245,000     4,245,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,773,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,245,000          
Memphis, TN - Atrium I & II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Atrium I & II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Centrum [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,030,000     4,030,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,156,000     9,156,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,013,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       5,580,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,563,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,013,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,143,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,156,000     9,156,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,030,000     4,030,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,156,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,030,000          
Memphis, TN - Centrum [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Centrum [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Comcast [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,036,000     3,036,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,566,000     9,566,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       946,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,620,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       946,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,620,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,566,000     9,566,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,036,000     3,036,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,566,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,036,000          
Memphis, TN - Comcast [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Comcast [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - International Place Phase II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 15,842,000     15,842,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 37,893,000     37,893,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       4,884,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       27,782,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,227,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,884,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       33,009,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 37,893,000     37,893,000    
SEC Schedule III, Real Estate Accumulated Depreciation 15,842,000     15,842,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 37,893,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 15,842,000          
Memphis, TN - International Place Phase II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - International Place Phase II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - PennMarc Centre [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,094,000     3,094,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 16,855,000     16,855,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,607,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       10,240,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,008,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,607,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,248,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,855,000     16,855,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,094,000     3,094,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 16,855,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,094,000          
Memphis, TN - PennMarc Centre [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - PennMarc Centre [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Shadow Creek I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,710,000     2,710,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,692,000     8,692,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       924,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       466,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       7,302,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,390,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,302,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,692,000     8,692,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,710,000     2,710,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 8,692,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,710,000          
Memphis, TN - Shadow Creek I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Shadow Creek I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Shadow Creek II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,521,000     2,521,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,102,000     8,102,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       734,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       467,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,901,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,201,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,901,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,102,000     8,102,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,521,000     2,521,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 8,102,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,521,000          
Memphis, TN - Shadow Creek II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Shadow Creek II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Southwind Office Center A [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,337,000     3,337,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,284,000     8,284,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,004,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       5,694,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       282,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,304,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,286,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,998,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,284,000     8,284,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,337,000     3,337,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 8,284,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,337,000          
Memphis, TN - Southwind Office Center A [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Southwind Office Center A [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Southwind Office Center B [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,321,000     4,321,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,381,000     10,381,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,366,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       7,754,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,261,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,366,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,015,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,381,000     10,381,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,321,000     4,321,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,381,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,321,000          
Memphis, TN - Southwind Office Center B [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Southwind Office Center B [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Southwind Office Center C [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,396,000     2,396,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,646,000     6,646,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,070,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       221,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,355,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,291,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,355,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,646,000     6,646,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,396,000     2,396,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,646,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,396,000          
Memphis, TN - Southwind Office Center C [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Southwind Office Center C [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Southwind Office Center D [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,316,000     2,316,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,576,000     6,576,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       744,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       193,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,639,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       937,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,639,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,576,000     6,576,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,316,000     2,316,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,576,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,316,000          
Memphis, TN - Southwind Office Center D [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Southwind Office Center D [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Colonnade [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,343,000     3,343,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,274,000     10,274,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,300,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,481,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       267,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,226,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,567,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,707,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,274,000     10,274,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,343,000     3,343,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,274,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,343,000          
Memphis, TN - Colonnade [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Colonnade [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - ThyssenKrupp Elevator Mfg Headquarters [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,298,000     3,298,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,407,000     9,407,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,040,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       25,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,342,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,065,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,342,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,407,000     9,407,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,298,000     3,298,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,407,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,298,000          
Memphis, TN - ThyssenKrupp Elevator Mfg Headquarters [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - ThyssenKrupp Elevator Mfg Headquarters [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Crescent Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 7,410,000     7,410,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 48,858,000     48,858,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       7,875,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       32,756,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (547,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,774,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       7,328,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       41,530,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 48,858,000     48,858,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,410,000     7,410,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 48,858,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,410,000          
Memphis, TN - Crescent Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Crescent Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Southwind Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,185,000     2,185,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,662,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (1,477,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,185,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,185,000     2,185,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,185,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Memphis, TN - Triad Center III [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 7,136,000     7,136,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 38,048,000     38,048,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,253,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       36,795,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,253,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       36,795,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 38,048,000     38,048,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,136,000     7,136,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 38,048,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,136,000          
Memphis, TN - Triad Center III [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Triad Center III [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Capital Grille [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 506,000     506,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,569,000     3,569,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       311,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,258,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       311,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,258,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,569,000     3,569,000    
SEC Schedule III, Real Estate Accumulated Depreciation 506,000     506,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,569,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 506,000          
Memphis, TN - Capital Grille [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Capital Grille [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - Seasons 52 [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 570,000     570,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,061,000     4,061,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       320,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,741,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       320,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,741,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,061,000     4,061,000    
SEC Schedule III, Real Estate Accumulated Depreciation 570,000     570,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,061,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 570,000          
Memphis, TN - Seasons 52 [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - Seasons 52 [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Memphis, TN - International Place IV [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,124,000     1,124,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 54,081,000     54,081,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       4,940,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       49,141,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,940,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       49,141,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 54,081,000     54,081,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,124,000     1,124,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 54,081,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,124,000          
Memphis, TN - International Place IV [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Memphis, TN - International Place IV [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - 3322 West End [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 12,830,000     12,830,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 34,173,000     34,173,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,025,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       27,490,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,658,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,025,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       31,148,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 34,173,000     34,173,000    
SEC Schedule III, Real Estate Accumulated Depreciation 12,830,000     12,830,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 34,173,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 12,830,000          
Nashville, TN - 3322 West End [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - 3322 West End [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - 3401 West End [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 13,300,000     13,300,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 32,181,000     32,181,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       5,862,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       22,917,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,402,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       5,862,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       26,319,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,181,000     32,181,000    
SEC Schedule III, Real Estate Accumulated Depreciation 13,300,000     13,300,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 32,181,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 13,300,000          
Nashville, TN - 3401 West End [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - 3401 West End [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - 5310 Maryland Way [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,037,000     4,037,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,715,000     12,715,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,863,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       7,201,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,651,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,863,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,852,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,715,000     12,715,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,037,000     4,037,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,715,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,037,000          
Nashville, TN - 5310 Maryland Way [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - 5310 Maryland Way [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Cool Springs 1 & 2 Deck [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 809,000     809,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,989,000     3,989,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,989,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,989,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,989,000     3,989,000    
SEC Schedule III, Real Estate Accumulated Depreciation 809,000     809,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,989,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 809,000          
Nashville, TN - Cool Springs 1 & 2 Deck [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Cool Springs 1 & 2 Deck [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Cool Springs 3 &4 Deck [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 969,000     969,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,461,000     4,461,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,461,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,461,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,461,000     4,461,000    
SEC Schedule III, Real Estate Accumulated Depreciation 969,000     969,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,461,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 969,000          
Nashville, TN - Cool Springs 3 &4 Deck [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Cool Springs 3 &4 Deck [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Cool Springs I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,571,000     5,571,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,667,000     15,667,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,583,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       15,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       14,069,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,598,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,069,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,667,000     15,667,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,571,000     5,571,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 15,667,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,571,000          
Nashville, TN - Cool Springs I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Cool Springs I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Cool Springs II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 6,413,000     6,413,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 19,996,000     19,996,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,824,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       346,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       17,826,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,170,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       17,826,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,996,000     19,996,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,413,000     6,413,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 19,996,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,413,000          
Nashville, TN - Cool Springs II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Cool Springs II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Cool Springs III [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,809,000     3,809,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 18,037,000     18,037,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,631,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       804,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,602,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,435,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,602,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 18,037,000     18,037,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,809,000     3,809,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 18,037,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,809,000          
Nashville, TN - Cool Springs III [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Cool Springs III [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Cool Springs IV [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,785,000     3,785,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 21,018,000     21,018,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,715,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       19,303,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,715,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       19,303,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,018,000     21,018,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,785,000     3,785,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 21,018,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,785,000          
Nashville, TN - Cool Springs IV [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Cool Springs IV [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Cool Springs V Healthways [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 13,966,000     13,966,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 56,942,000     56,942,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,688,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       295,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       52,959,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,983,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       52,959,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 56,942,000     56,942,000    
SEC Schedule III, Real Estate Accumulated Depreciation 13,966,000     13,966,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 56,942,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 13,966,000          
Nashville, TN - Cool Springs V Healthways [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Cool Springs V Healthways [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Harpeth on the Green II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,857,000     3,857,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,051,000     9,051,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,419,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       5,677,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,955,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,419,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,632,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,051,000     9,051,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,857,000     3,857,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,051,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,857,000          
Nashville, TN - Harpeth on the Green II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Harpeth on the Green II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Harpeth on the Green III [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,852,000     3,852,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,531,000     10,531,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,660,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,649,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,222,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,660,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,871,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,531,000     10,531,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,852,000     3,852,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,531,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,852,000          
Nashville, TN - Harpeth on the Green III [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Harpeth on the Green III [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Harpeth on the Green IV [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,028,000     4,028,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,229,000     10,229,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,713,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,842,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,674,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,713,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,516,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,229,000     10,229,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,028,000     4,028,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,229,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,028,000          
Nashville, TN - Harpeth on the Green IV [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Harpeth on the Green IV [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Harpeth on The Green V [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,090,000     2,090,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,286,000     6,286,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       662,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       197,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,427,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       859,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,427,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,286,000     6,286,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,090,000     2,090,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,286,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,090,000          
Nashville, TN - Harpeth on The Green V [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Harpeth on The Green V [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Hickory Trace [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,568,000     1,568,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,801,000     5,801,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,164,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       164,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,473,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,328,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,473,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,801,000     5,801,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,568,000     1,568,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,801,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,568,000          
Nashville, TN - Hickory Trace [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Hickory Trace [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Highwoods Plaza I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,192,000     4,192,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,703,000     10,703,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,552,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       307,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,844,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,859,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,844,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,703,000     10,703,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,192,000     4,192,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,703,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,192,000          
Nashville, TN - Highwoods Plaza I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Highwoods Plaza I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Highwoods Plaza II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,953,000     2,953,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,560,000     10,560,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,448,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       307,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,805,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,755,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,805,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,560,000     10,560,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,953,000     2,953,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,560,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,953,000          
Nashville, TN - Highwoods Plaza II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Highwoods Plaza II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Seven Springs - Land II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 0     0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,715,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (3,715,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 0     0    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 0          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Nashville, TN - Seven Springs I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 4,181,000     4,181,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,995,000     14,995,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,076,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       592,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,327,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,668,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,327,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,995,000     14,995,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,181,000     4,181,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,995,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,181,000          
Nashville, TN - Seven Springs I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Seven Springs I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - SouthPointe [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,031,000     3,031,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,987,000     8,987,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,655,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       310,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       7,022,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,965,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,022,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,987,000     8,987,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,031,000     3,031,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 8,987,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,031,000          
Nashville, TN - SouthPointe [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - SouthPointe [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - The Ramparts of Brentwood [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 6,485,000     6,485,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,614,000     17,614,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,394,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       12,806,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,414,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,394,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,220,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,614,000     17,614,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,485,000     6,485,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 17,614,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,485,000          
Nashville, TN - The Ramparts of Brentwood [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - The Ramparts of Brentwood [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Westwood South [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,756,000     3,756,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,735,000     12,735,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,106,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       382,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,247,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,488,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,247,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,735,000     12,735,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,756,000     3,756,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,735,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,756,000          
Nashville, TN - Westwood South [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Westwood South [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - 100 Winners Circle [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,124,000     4,124,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,679,000     10,679,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,497,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       7,258,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,924,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,497,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,182,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,679,000     10,679,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,124,000     4,124,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,679,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,124,000          
Nashville, TN - 100 Winners Circle [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - 100 Winners Circle [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - The Pinnacle at Symphony Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 12,358,000     12,358,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 147,217,000     147,217,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       141,469,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,748,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       147,217,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 147,217,000     147,217,000    
SEC Schedule III, Real Estate Accumulated Depreciation 12,358,000     12,358,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 147,217,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 12,358,000          
Nashville, TN - The Pinnacle at Symphony Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - The Pinnacle at Symphony Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - Seven Springs East [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,529,000     2,529,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 40,112,000     40,112,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       2,525,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       37,587,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,525,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       37,587,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 40,112,000     40,112,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,529,000     2,529,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 40,112,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,529,000          
Nashville, TN - Seven Springs East [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - Seven Springs East [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Nashville, TN - The Shops at Seven Springs [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 674,000     674,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,026,000     9,026,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       803,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,223,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       803,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,223,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,026,000     9,026,000    
SEC Schedule III, Real Estate Accumulated Depreciation 674,000     674,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,026,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 674,000          
Nashville, TN - The Shops at Seven Springs [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Nashville, TN - The Shops at Seven Springs [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Orlando, FL - Berkshire at MetroCenter [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,969,000     2,969,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,747,000     13,747,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,265,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       672,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,810,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,937,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,810,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,747,000     13,747,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,969,000     2,969,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,747,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,969,000          
Orlando, FL - Berkshire at MetroCenter [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Orlando, FL - Berkshire at MetroCenter [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Orlando, FL - Capital Plaza III Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,012,000     3,012,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,994,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       18,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,012,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,012,000     3,012,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,012,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Orlando, FL - Eola Park Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,027,000     2,027,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,027,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,027,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,027,000     2,027,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,027,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Orlando, FL - Oxford Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,151,000     1,151,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,100,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       51,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,151,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,151,000     1,151,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,151,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Orlando, FL - Stratford Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,886,000     1,886,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,034,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (148,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,886,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,886,000     1,886,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,886,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Orlando, FL - Windsor at Metro Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 2,553,000     2,553,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,413,000     10,413,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       2,060,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,353,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,060,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,353,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,413,000     10,413,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,553,000     2,553,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,413,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,553,000          
Orlando, FL - Windsor at Metro Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Orlando, FL - Windsor at Metro Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
South Florida - The 1800 Eller Drive Building [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 7,122,000     7,122,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,312,000     13,312,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       9,851,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,461,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,312,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,312,000     13,312,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,122,000     7,122,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,312,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,122,000          
South Florida - The 1800 Eller Drive Building [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
South Florida - The 1800 Eller Drive Building [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Orlando - Seaside Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,368,000     3,368,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 37,561,000     37,561,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,893,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       29,541,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,127,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,893,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       33,668,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 37,561,000     37,561,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,368,000     3,368,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 37,561,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,368,000          
Orlando - Seaside Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Orlando - Seaside Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Orlando - Capital Plaza Two [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,822,000     3,822,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 50,231,000     50,231,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       4,346,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       43,394,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,491,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,346,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       45,885,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 50,231,000     50,231,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,822,000     3,822,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 50,231,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,822,000          
Orlando - Capital Plaza Two [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Orlando - Capital Plaza Two [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Orlando - Capital Plaza One [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,119,000     3,119,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 32,496,000     32,496,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,482,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       27,321,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,693,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,482,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       29,014,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,496,000     32,496,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,119,000     3,119,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 32,496,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,119,000          
Orlando - Capital Plaza One [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Orlando - Capital Plaza One [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Orlando - Landmark Center Two [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,545,000     2,545,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 30,353,000     30,353,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       4,743,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       22,031,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,579,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,743,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,610,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 30,353,000     30,353,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,545,000     2,545,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 30,353,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,545,000          
Orlando - Landmark Center Two [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Orlando - Landmark Center Two [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Orlando - Landmark Center One [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,345,000     2,345,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 31,893,000     31,893,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       6,207,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       22,655,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,031,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       6,207,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,686,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,893,000     31,893,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,345,000     2,345,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 31,893,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,345,000          
Orlando - Landmark Center One [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Orlando - Landmark Center One [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
South Florida - Lincoln Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,130,000     2,130,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 60,180,000     60,180,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,490,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       56,079,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       611,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,490,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       56,690,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 60,180,000     60,180,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,130,000     2,130,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 60,180,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,130,000          
South Florida - Lincoln Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
South Florida - Lincoln Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Orlando, FL - Eola [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 716,000     716,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,918,000     14,918,000    
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances       19,199,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       3,758,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,160,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,758,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,160,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,918,000     14,918,000    
SEC Schedule III, Real Estate Accumulated Depreciation 716,000     716,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,918,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 716,000          
Orlando, FL - Eola [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Orlando, FL - Eola [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 6348 Burnt Poplar [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,660,000     1,660,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,878,000     3,878,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       724,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,900,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       254,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       724,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,154,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,878,000     3,878,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,660,000     1,660,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,878,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,660,000          
Greensboro, NC - 6348 Burnt Poplar [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 6348 Burnt Poplar [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 6350 Burnt Poplar [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 804,000     804,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,058,000     2,058,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       341,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,374,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       343,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       341,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,717,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,058,000     2,058,000    
SEC Schedule III, Real Estate Accumulated Depreciation 804,000     804,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,058,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 804,000          
Greensboro, NC - 6350 Burnt Poplar [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 6350 Burnt Poplar [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 420 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,006,000     1,006,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,514,000     2,514,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       379,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,516,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       619,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       379,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,135,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,514,000     2,514,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,006,000     1,006,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,514,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,006,000          
Greensboro, NC - 420 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 420 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 418 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,207,000     1,207,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,900,000     2,900,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       462,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,849,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       589,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       462,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,438,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,900,000     2,900,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,207,000     1,207,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,900,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,207,000          
Greensboro, NC - 418 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 418 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 416 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 814,000     814,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,032,000     2,032,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       322,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,293,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       417,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       322,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,710,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,032,000     2,032,000    
SEC Schedule III, Real Estate Accumulated Depreciation 814,000     814,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,032,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 814,000          
Greensboro, NC - 416 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 416 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7031 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,700,000     2,700,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,018,000     6,018,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       510,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,921,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,587,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       510,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,508,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,018,000     6,018,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,700,000     2,700,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,018,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,700,000          
Greensboro, NC - 7031 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7031 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7029 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,443,000     2,443,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,813,000     5,813,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       739,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       3,237,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,837,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       739,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,074,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,813,000     5,813,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,443,000     2,443,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,813,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,443,000          
Greensboro, NC - 7029 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7029 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7025 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 6,988,000     6,988,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,159,000     17,159,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,393,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       9,576,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,190,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,393,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,766,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,159,000     17,159,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,988,000     6,988,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 17,159,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,988,000          
Greensboro, NC - 7025 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7025 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7027 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,851,000     1,851,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,080,000     6,080,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       850,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       699,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,531,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,549,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,531,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,080,000     6,080,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,851,000     1,851,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,080,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,851,000          
Greensboro, NC - 7027 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7027 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7009 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 629,000     629,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,567,000     1,567,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       224,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,068,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       275,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       224,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,343,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,567,000     1,567,000    
SEC Schedule III, Real Estate Accumulated Depreciation 629,000     629,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,567,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 629,000          
Greensboro, NC - 7009 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7009 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 426 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 542,000     542,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,098,000     2,098,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       465,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       380,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,253,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       845,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,253,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,098,000     2,098,000    
SEC Schedule III, Real Estate Accumulated Depreciation 542,000     542,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,098,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 542,000          
Greensboro, NC - 426 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 426 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 422 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 743,000     743,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,603,000     1,603,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       145,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,081,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       377,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       145,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,458,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,603,000     1,603,000    
SEC Schedule III, Real Estate Accumulated Depreciation 743,000     743,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,603,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 743,000          
Greensboro, NC - 422 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 422 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 406 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 471,000     471,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,446,000     1,446,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       265,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       270,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       911,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       535,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       911,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,446,000     1,446,000    
SEC Schedule III, Real Estate Accumulated Depreciation 471,000     471,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,446,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 471,000          
Greensboro, NC - 406 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 406 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7021 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 698,000     698,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,626,000     1,626,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       237,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,103,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       286,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       237,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,389,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,626,000     1,626,000    
SEC Schedule III, Real Estate Accumulated Depreciation 698,000     698,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,626,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 698,000          
Greensboro, NC - 7021 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7021 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7019 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 552,000     552,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,448,000     1,448,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       192,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       946,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       310,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       192,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,256,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,448,000     1,448,000    
SEC Schedule III, Real Estate Accumulated Depreciation 552,000     552,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,448,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 552,000          
Greensboro, NC - 7019 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7019 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7015 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 757,000     757,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,807,000     1,807,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       305,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,219,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       283,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       305,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,502,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,807,000     1,807,000    
SEC Schedule III, Real Estate Accumulated Depreciation 757,000     757,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,807,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 757,000          
Greensboro, NC - 7015 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7015 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7017 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 571,000     571,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,612,000     1,612,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       225,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       928,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       459,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       225,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,387,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,612,000     1,612,000    
SEC Schedule III, Real Estate Accumulated Depreciation 571,000     571,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,612,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 571,000          
Greensboro, NC - 7017 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7017 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7011 Albert Pick Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 541,000     541,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,328,000     1,328,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       171,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       777,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       380,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       171,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,157,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,328,000     1,328,000    
SEC Schedule III, Real Estate Accumulated Depreciation 541,000     541,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,328,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 541,000          
Greensboro, NC - 7011 Albert Pick Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7011 Albert Pick Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 424 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 340,000     340,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,328,000     1,328,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       271,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       239,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       818,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       510,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       818,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,328,000     1,328,000    
SEC Schedule III, Real Estate Accumulated Depreciation 340,000     340,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,328,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 340,000          
Greensboro, NC - 424 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 424 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 410 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,058,000     1,058,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,703,000     2,703,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       356,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,613,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       734,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       356,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,347,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,703,000     2,703,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,058,000     1,058,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,703,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,058,000          
Greensboro, NC - 410 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 410 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 412 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 996,000     996,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,470,000     2,470,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       374,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,523,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       573,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       374,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,096,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,470,000     2,470,000    
SEC Schedule III, Real Estate Accumulated Depreciation 996,000     996,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,470,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 996,000          
Greensboro, NC - 412 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 412 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 408 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,189,000     1,189,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,595,000     2,595,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       341,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,486,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       768,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       341,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,254,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,595,000     2,595,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,189,000     1,189,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,595,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,189,000          
Greensboro, NC - 408 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 408 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 414 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,821,000     1,821,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,293,000     4,293,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       659,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,676,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       958,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       659,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,634,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,293,000     4,293,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,821,000     1,821,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,293,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,821,000          
Greensboro, NC - 414 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 414 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 237 Burgess Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,990,000     1,990,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,468,000     4,468,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       860,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,919,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       689,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       860,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,608,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,468,000     4,468,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,990,000     1,990,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,468,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,990,000          
Greensboro, NC - 237 Burgess Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 237 Burgess Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 235 Burgess Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,664,000     2,664,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,861,000     6,861,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,302,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,392,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,167,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,302,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,559,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,861,000     6,861,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,664,000     2,664,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,861,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,664,000          
Greensboro, NC - 235 Burgess Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 235 Burgess Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 241 Burgess Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,302,000     1,302,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,838,000     2,838,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       450,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,517,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       871,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       450,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,388,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,838,000     2,838,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,302,000     1,302,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,838,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,302,000          
Greensboro, NC - 241 Burgess Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 241 Burgess Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 243 Burgess Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 906,000     906,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,135,000     2,135,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       452,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,514,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       169,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       452,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       1,683,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,135,000     2,135,000    
SEC Schedule III, Real Estate Accumulated Depreciation 906,000     906,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,135,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 906,000          
Greensboro, NC - 243 Burgess Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 243 Burgess Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 496 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,340,000     1,340,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,181,000     3,181,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       546,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,635,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       546,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,635,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,181,000     3,181,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,340,000     1,340,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,181,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,340,000          
Greensboro, NC - 496 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 496 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 494 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,049,000     1,049,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,578,000     3,578,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       749,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,829,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       749,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,829,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,578,000     3,578,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,049,000     1,049,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,578,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,049,000          
Greensboro, NC - 494 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 494 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 486 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 928,000     928,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,216,000     3,216,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       603,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,613,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       603,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,613,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,216,000     3,216,000    
SEC Schedule III, Real Estate Accumulated Depreciation 928,000     928,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,216,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 928,000          
Greensboro, NC - 486 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 486 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 488 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 812,000     812,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,692,000     2,692,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       499,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,193,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       499,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,193,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,692,000     2,692,000    
SEC Schedule III, Real Estate Accumulated Depreciation 812,000     812,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,692,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 812,000          
Greensboro, NC - 488 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 488 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 490 Gallimore Dairy Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,431,000     3,431,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,642,000     7,642,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,733,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,909,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,733,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,909,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,642,000     7,642,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,431,000     3,431,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,642,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,431,000          
Greensboro, NC - 490 Gallimore Dairy Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 490 Gallimore Dairy Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - Brigham Road - Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,449,000     2,449,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       7,059,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (4,610,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,449,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,449,000     2,449,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,449,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Greensboro, NC - 651 Brigham Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 1,130,000     1,130,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,793,000     3,793,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       453,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       360,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,980,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       813,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,980,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,793,000     3,793,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,130,000     1,130,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,793,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,130,000          
Greensboro, NC - 651 Brigham Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 651 Brigham Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 657 Brigham Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,012,000     3,012,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,861,000     14,861,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,733,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       881,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,247,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,614,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,247,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,861,000     14,861,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,012,000     3,012,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,861,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,012,000          
Greensboro, NC - 657 Brigham Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 657 Brigham Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 653 Brigham Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 723,000     723,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,401,000     4,401,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       814,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,587,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       814,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,587,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,401,000     4,401,000    
SEC Schedule III, Real Estate Accumulated Depreciation 723,000     723,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,401,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 723,000          
Greensboro, NC - 653 Brigham Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 653 Brigham Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 1501 Highwoods Boulevard [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,758,000     2,758,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,510,000     9,510,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,476,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       8,034,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,476,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,034,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,510,000     9,510,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,758,000     2,758,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,510,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,758,000          
Greensboro, NC - 1501 Highwoods Boulevard [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 1501 Highwoods Boulevard [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - Jefferson Pilot Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,448,000     7,448,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       11,759,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (4,311,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       7,448,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,448,000     7,448,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,448,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Greensboro, NC - 4200 Tudor Lane [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 1,099,000     1,099,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,186,000     3,186,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       515,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       383,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,288,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       898,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,288,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,186,000     3,186,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,099,000     1,099,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,186,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,099,000          
Greensboro, NC - 4200 Tudor Lane [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 4200 Tudor Lane [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 4224 Tudor Lane [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 852,000     852,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,826,000     2,826,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       435,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       288,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,103,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       723,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,103,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,826,000     2,826,000    
SEC Schedule III, Real Estate Accumulated Depreciation 852,000     852,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,826,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 852,000          
Greensboro, NC - 4224 Tudor Lane [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 4224 Tudor Lane [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 7023 Albert Pick [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,134,000     2,134,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,320,000     5,320,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       834,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       3,459,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,027,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       834,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,486,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,320,000     5,320,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,134,000     2,134,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,320,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,134,000          
Greensboro, NC - 7023 Albert Pick [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 7023 Albert Pick [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 370 Knollwood Street [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,068,000     5,068,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,023,000     13,023,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,826,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       7,495,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,702,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,826,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,197,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,023,000     13,023,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,068,000     5,068,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,023,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,068,000          
Greensboro, NC - 370 Knollwood Street [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 370 Knollwood Street [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 380 Knollwood Street [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 8,289,000     8,289,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 19,199,000     19,199,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,989,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       12,029,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,181,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,989,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       16,210,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,199,000     19,199,000    
SEC Schedule III, Real Estate Accumulated Depreciation 8,289,000     8,289,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 19,199,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 8,289,000          
Greensboro, NC - 380 Knollwood Street [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 380 Knollwood Street [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - Church Street Medical Center I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 943,000     943,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,118,000     12,118,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,734,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       9,129,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       255,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,734,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,384,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,118,000     12,118,000    
SEC Schedule III, Real Estate Accumulated Depreciation 943,000     943,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,118,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 943,000          
Greensboro, NC - Church Street Medical Center I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - Church Street Medical Center I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - Church Street Medical Center II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 877,000     877,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,869,000     7,869,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,376,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       5,451,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       42,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,376,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,493,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,869,000     7,869,000    
SEC Schedule III, Real Estate Accumulated Depreciation 877,000     877,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,869,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 877,000          
Greensboro, NC - Church Street Medical Center II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - Church Street Medical Center II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - Church Street Medical Center III [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 650,000     650,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,589,000     5,589,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       925,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,551,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       113,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       925,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,664,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,589,000     5,589,000    
SEC Schedule III, Real Estate Accumulated Depreciation 650,000     650,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,589,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 650,000          
Greensboro, NC - Church Street Medical Center III [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - Church Street Medical Center III [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 628 Green Valley [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,153,000     1,153,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,961,000     15,961,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,906,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       12,141,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       914,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,906,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,055,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,961,000     15,961,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,153,000     1,153,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 15,961,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,153,000          
Greensboro, NC - 628 Green Valley [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 628 Green Valley [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Greensboro, NC - 701 Green Valley [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,091,000     1,091,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,387,000     12,387,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,787,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       7,719,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       881,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,787,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,600,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,387,000     12,387,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,091,000     1,091,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,387,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,091,000          
Greensboro, NC - 701 Green Valley [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Greensboro, NC - 701 Green Valley [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Pittsburgh, PA - One PPG Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 20,301,000     20,301,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 154,040,000     154,040,000    
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances [1]       112,230,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       9,819,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       107,643,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       36,578,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       9,819,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       144,221,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 154,040,000     154,040,000    
SEC Schedule III, Real Estate Accumulated Depreciation 20,301,000     20,301,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 154,040,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 20,301,000          
Pittsburgh, PA - One PPG Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Pittsburgh, PA - One PPG Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Pittsburgh, PA - Two PPG Place - Office [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,623,000     1,623,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 17,229,000     17,229,000    
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances [1]       112,230,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,302,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       10,978,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,949,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,302,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,927,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 17,229,000     17,229,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,623,000     1,623,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 17,229,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,623,000          
Pittsburgh, PA - Two PPG Place - Office [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Pittsburgh, PA - Two PPG Place - Office [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Pittsburgh, PA - Three PPG Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 758,000     758,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,275,000     7,275,000    
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances [1]       112,230,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       501,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,923,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,851,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       501,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,774,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,275,000     7,275,000    
SEC Schedule III, Real Estate Accumulated Depreciation 758,000     758,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,275,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 758,000          
Pittsburgh, PA - Three PPG Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Pittsburgh, PA - Three PPG Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Pittsburgh, PA - Four PPG Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 688,000     688,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,304,000     5,304,000    
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances [1]       112,230,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       620,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       3,239,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,445,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       620,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,684,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,304,000     5,304,000    
SEC Schedule III, Real Estate Accumulated Depreciation 688,000     688,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,304,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 688,000          
Pittsburgh, PA - Four PPG Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Pittsburgh, PA - Four PPG Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Pittsburgh, PA - Five PPG Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,116,000     1,116,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,338,000     7,338,000    
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances [1]       112,230,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       803,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,924,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,611,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       803,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,535,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,338,000     7,338,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,116,000     1,116,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,338,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,116,000          
Pittsburgh, PA - Five PPG Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Pittsburgh, PA - Five PPG Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Pittsburgh, PA - Six PPG Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,603,000     3,603,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 34,779,000     34,779,000    
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances [1]       112,230,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,353,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       25,602,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,824,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,353,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       31,426,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 34,779,000     34,779,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,603,000     3,603,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 34,779,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,603,000          
Pittsburgh, PA - Six PPG Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Pittsburgh, PA - Six PPG Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Pittsburgh, PA - EQT Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 10,773,000     10,773,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 93,235,000     93,235,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       83,812,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,423,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       93,235,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 93,235,000     93,235,000    
SEC Schedule III, Real Estate Accumulated Depreciation 10,773,000     10,773,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 93,235,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 10,773,000          
Pittsburgh, PA - EQT Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Pittsburgh, PA - EQT Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 3600 Glenwood Avenue [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 7,388,000     7,388,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,425,000     15,425,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       10,994,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,431,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,425,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,425,000     15,425,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,388,000     7,388,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 15,425,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,388,000          
Raleigh, NC - 3600 Glenwood Avenue [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 3600 Glenwood Avenue [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 3737 Glenwood Avenue [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,981,000     5,981,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,983,000     15,983,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       318,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,665,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       318,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,665,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,983,000     15,983,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,981,000     5,981,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 15,983,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,981,000          
Raleigh, NC - 3737 Glenwood Avenue [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 3737 Glenwood Avenue [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 4800 North Park [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 14,175,000     14,175,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 27,834,000     27,834,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,678,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       17,630,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       7,526,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,678,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,156,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,834,000     27,834,000    
SEC Schedule III, Real Estate Accumulated Depreciation 14,175,000     14,175,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 27,834,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 14,175,000          
Raleigh, NC - 4800 North Park [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 4800 North Park [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 4900 North Park [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,757,000     1,757,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,917,000     4,917,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       770,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,983,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,164,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       770,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,147,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,917,000     4,917,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,757,000     1,757,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,917,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,757,000          
Raleigh, NC - 4900 North Park [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 4900 North Park [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 5000 North Park [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,177,000     4,177,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,606,000     8,606,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,010,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,612,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (49,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,033,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       961,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,645,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,606,000     8,606,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,177,000     4,177,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 8,606,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,177,000          
Raleigh, NC - 5000 North Park [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 5000 North Park [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 801 Raleigh Corporate Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,575,000     3,575,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,811,000     11,811,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       828,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       272,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,711,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,100,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,711,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,811,000     11,811,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,575,000     3,575,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 11,811,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,575,000          
Raleigh, NC - 801 Raleigh Corporate Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 801 Raleigh Corporate Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Blue Ridge I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,168,000     3,168,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,763,000     6,763,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       722,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,606,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,435,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       722,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,041,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,763,000     6,763,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,168,000     3,168,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,763,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,168,000          
Raleigh, NC - Blue Ridge I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Blue Ridge I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Blue Ridge II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,344,000     1,344,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,655,000     2,655,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       462,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,410,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       783,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       462,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,193,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,655,000     2,655,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,344,000     1,344,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,655,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,344,000          
Raleigh, NC - Blue Ridge II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Blue Ridge II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Cape Fear [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,262,000     2,262,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,882,000     2,882,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       131,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,630,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (2,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,123,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       129,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,753,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,882,000     2,882,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,262,000     2,262,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,882,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,262,000          
Raleigh, NC - Cape Fear [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Cape Fear [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Catawba [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,419,000     3,419,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,128,000     4,128,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       125,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,635,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (2,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,370,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       123,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,005,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,128,000     4,128,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,419,000     3,419,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,128,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,419,000          
Raleigh, NC - Catawba [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Catawba [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - CentreGreen One [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,143,000     4,143,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,788,000     11,788,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,529,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (391,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,650,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,138,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,650,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,788,000     11,788,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,143,000     4,143,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 11,788,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,143,000          
Raleigh, NC - CentreGreen One [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - CentreGreen One [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - CentreGreen Two [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,095,000     3,095,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,916,000     10,916,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,653,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (389,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,652,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,264,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,652,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,916,000     10,916,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,095,000     3,095,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,916,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,095,000          
Raleigh, NC - CentreGreen Two [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - CentreGreen Two [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - CentreGreen Three - Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,291,000     1,291,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,876,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (585,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,291,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,291,000     1,291,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,291,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Raleigh, NC - CentreGreen Four [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 2,952,000     2,952,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,892,000     14,892,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,779,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (397,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       13,510,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,382,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,510,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,892,000     14,892,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,952,000     2,952,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,892,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,952,000          
Raleigh, NC - CentreGreen Four [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - CentreGreen Four [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - CentreGreen Five [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,141,000     4,141,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,097,000     14,097,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,280,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       55,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,762,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,335,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,762,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,097,000     14,097,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,141,000     4,141,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,097,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,141,000          
Raleigh, NC - CentreGreen Five [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - CentreGreen Five [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Cottonwood [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,057,000     2,057,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,441,000     4,441,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       609,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       3,244,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       588,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       609,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,832,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,441,000     4,441,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,057,000     2,057,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,441,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,057,000          
Raleigh, NC - Cottonwood [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Cottonwood [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Dogwood [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,815,000     1,815,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,074,000     4,074,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       766,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,769,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       539,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       766,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,308,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,074,000     4,074,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,815,000     1,815,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,074,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,815,000          
Raleigh, NC - Dogwood [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Dogwood [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - GlenLake Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 42,000     42,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,758,000     4,758,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       13,003,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (8,359,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       114,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,644,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       114,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,758,000     4,758,000    
SEC Schedule III, Real Estate Accumulated Depreciation 42,000     42,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,758,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 42,000          
Raleigh, NC - GlenLake Land [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - GlenLake Land [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - GlenLake One [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 6,903,000     6,903,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 22,690,000     22,690,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       924,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       1,324,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       20,442,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,248,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       20,442,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,690,000     22,690,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,903,000     6,903,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 22,690,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,903,000          
Raleigh, NC - GlenLake One [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - GlenLake One [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - GlenLake Four [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 6,944,000     6,944,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 24,000,000     24,000,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,659,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       493,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       21,848,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,152,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       21,848,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 24,000,000     24,000,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,944,000     6,944,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 24,000,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,944,000          
Raleigh, NC - GlenLake Four [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - GlenLake Four [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - GlenLake Six [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,734,000     5,734,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 22,905,000     22,905,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       941,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (365,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       22,329,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       576,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       22,329,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,905,000     22,905,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,734,000     5,734,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 22,905,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,734,000          
Raleigh, NC - GlenLake Six [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - GlenLake Six [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 701 Raleigh Corporate Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 7,566,000     7,566,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 16,493,000     16,493,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,304,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       540,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       14,649,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,844,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       14,649,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,493,000     16,493,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,566,000     7,566,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 16,493,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,566,000          
Raleigh, NC - 701 Raleigh Corporate Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 701 Raleigh Corporate Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Highwoods Centre [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,163,000     3,163,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,851,000     7,851,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       531,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (267,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       7,587,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       264,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,587,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,851,000     7,851,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,163,000     3,163,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,851,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,163,000          
Raleigh, NC - Highwoods Centre [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Highwoods Centre [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Highwoods Office Center North Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 35,000     35,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 406,000     406,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       357,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       49,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       357,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       49,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 406,000     406,000    
SEC Schedule III, Real Estate Accumulated Depreciation 35,000     35,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 406,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 35,000          
Raleigh, NC - Highwoods Office Center North Land [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Highwoods Office Center North Land [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Highwoods Tower One [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 11,861,000     11,861,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 21,223,000     21,223,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       203,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       16,744,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,276,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       203,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       21,020,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,223,000     21,223,000    
SEC Schedule III, Real Estate Accumulated Depreciation 11,861,000     11,861,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 21,223,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 11,861,000          
Raleigh, NC - Highwoods Tower One [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Highwoods Tower One [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Highwoods Tower Two [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 8,164,000     8,164,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 22,432,000     22,432,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       365,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       503,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       21,564,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       868,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       21,564,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,432,000     22,432,000    
SEC Schedule III, Real Estate Accumulated Depreciation 8,164,000     8,164,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 22,432,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 8,164,000          
Raleigh, NC - Highwoods Tower Two [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Highwoods Tower Two [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Inveresk Land Parcel 2 [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,000     1,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 805,000     805,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       657,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       38,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       110,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       695,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       110,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 805,000     805,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,000     1,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 805,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 1,000          
Raleigh, NC - Lake Boone Medical Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 1,037,000     1,037,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,942,000     7,942,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,450,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,311,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       181,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,450,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,492,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,942,000     7,942,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,037,000     1,037,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,942,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,037,000          
Raleigh, NC - Lake Boone Medical Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Lake Boone Medical Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 4620 Creekstone Drive [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,109,000     1,109,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,341,000     3,341,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       149,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       107,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,085,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       256,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,085,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,341,000     3,341,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,109,000     1,109,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,341,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,109,000          
Raleigh, NC - 4620 Creekstone Drive [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 4620 Creekstone Drive [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 4825 Creekstone Drive [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,415,000     4,415,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,771,000     10,771,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       398,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       293,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,080,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       691,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,080,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,771,000     10,771,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,415,000     4,415,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,771,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,415,000          
Raleigh, NC - 4825 Creekstone Drive [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 4825 Creekstone Drive [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Pamlico [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 6,821,000     6,821,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,717,000     10,717,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       289,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,428,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       289,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,428,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,717,000     10,717,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,821,000     6,821,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,717,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,821,000          
Raleigh, NC - Pamlico [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Pamlico [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - ParkWest One [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,210,000     1,210,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,581,000     3,581,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       242,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,339,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       242,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,339,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,581,000     3,581,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,210,000     1,210,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,581,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,210,000          
Raleigh, NC - ParkWest One [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - ParkWest One [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - ParkWest Two [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,215,000     1,215,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,641,000     3,641,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       356,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,285,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       356,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,285,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,641,000     3,641,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,215,000     1,215,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,641,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,215,000          
Raleigh, NC - ParkWest Two [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - ParkWest Two [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Progress Center Renovation [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 297,000     297,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 362,000     362,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       362,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       362,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 362,000     362,000    
SEC Schedule III, Real Estate Accumulated Depreciation 297,000     297,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 362,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 297,000          
Raleigh, NC - Progress Center Renovation [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Progress Center Renovation [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Raleigh Corp Center Lot D [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,219,000     1,219,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,211,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       8,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,219,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,219,000     1,219,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,219,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Raleigh, NC - PNC Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 17,248,000     17,248,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 73,440,000     73,440,000    
Real Estate and Accumulated Depreciation [Line Items]            
Real Estate and Accumulated Depreciation, Encumbrances       43,852,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,206,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       72,234,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,206,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       72,234,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 73,440,000     73,440,000    
SEC Schedule III, Real Estate Accumulated Depreciation 17,248,000     17,248,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 73,440,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 17,248,000          
Raleigh, NC - PNC Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - PNC Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Rexwoods Center I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,187,000     3,187,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,142,000     6,142,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       878,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       3,730,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,534,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       878,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,264,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,142,000     6,142,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,187,000     3,187,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,142,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,187,000          
Raleigh, NC - Rexwoods Center I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Rexwoods Center I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Rexwoods Center II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,321,000     1,321,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,266,000     3,266,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       362,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       1,818,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,086,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       362,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,904,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,266,000     3,266,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,321,000     1,321,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,266,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,321,000          
Raleigh, NC - Rexwoods Center II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Rexwoods Center II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Rexwoods Center III [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,170,000     2,170,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,694,000     4,694,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       919,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,816,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       959,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       919,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,775,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,694,000     4,694,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,170,000     2,170,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,694,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,170,000          
Raleigh, NC - Rexwoods Center III [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Rexwoods Center III [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Rexwoods Center IV [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,016,000     2,016,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,900,000     4,900,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       586,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,314,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       586,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,314,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,900,000     4,900,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,016,000     2,016,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,900,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,016,000          
Raleigh, NC - Rexwoods Center IV [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Rexwoods Center IV [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Rexwoods Center V [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,525,000     2,525,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,838,000     7,838,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,301,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       184,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,353,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,485,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,353,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,838,000     7,838,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,525,000     2,525,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,838,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,525,000          
Raleigh, NC - Rexwoods Center V [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Rexwoods Center V [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Riverbirch [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,455,000     1,455,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,719,000     9,719,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       469,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,038,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       23,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,189,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       492,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,227,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,719,000     9,719,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,455,000     1,455,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,719,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,455,000          
Raleigh, NC - Riverbirch [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Riverbirch [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Situs I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,612,000     1,612,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,562,000     4,562,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       692,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,646,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       178,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (954,000)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       870,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,692,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,562,000     4,562,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,612,000     1,612,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,562,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,612,000          
Raleigh, NC - Situs I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Situs I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Situs II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,252,000     2,252,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,175,000     6,175,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       718,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,254,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       181,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (978,000)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       899,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,276,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,175,000     6,175,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,252,000     2,252,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,175,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,252,000          
Raleigh, NC - Situs II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Situs II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Situs III [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,014,000     1,014,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,376,000     3,376,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       440,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,078,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       119,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (1,261,000)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       559,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,817,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,376,000     3,376,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,014,000     1,014,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,376,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,014,000          
Raleigh, NC - Situs III [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Situs III [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Six Forks Center I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,271,000     2,271,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,205,000     5,205,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       666,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,665,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,874,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       666,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,539,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,205,000     5,205,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,271,000     2,271,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,205,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,271,000          
Raleigh, NC - Six Forks Center I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Six Forks Center I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Six Forks Center II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,560,000     3,560,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,890,000     7,890,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,086,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,533,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,271,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,086,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,804,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,890,000     7,890,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,560,000     3,560,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,890,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,560,000          
Raleigh, NC - Six Forks Center II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Six Forks Center II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Six Forks Center III [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,836,000     3,836,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,997,000     7,997,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       862,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,411,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,724,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       862,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,135,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,997,000     7,997,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,836,000     3,836,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,997,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,836,000          
Raleigh, NC - Six Forks Center III [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Six Forks Center III [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Smoketree Tower [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 8,465,000     8,465,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 20,144,000     20,144,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,353,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       11,743,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,048,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,353,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       17,791,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,144,000     20,144,000    
SEC Schedule III, Real Estate Accumulated Depreciation 8,465,000     8,465,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 20,144,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 8,465,000          
Raleigh, NC - Smoketree Tower [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Smoketree Tower [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 4601 Creekstone Drive [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,535,000     2,535,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,948,000     5,948,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       255,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       217,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,476,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       472,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,476,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,948,000     5,948,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,535,000     2,535,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,948,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,535,000          
Raleigh, NC - 4601 Creekstone Drive [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 4601 Creekstone Drive [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Weston Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,779,000     7,779,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       22,771,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (14,992,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       7,779,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,779,000     7,779,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,779,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Raleigh, NC - 4625 Creekstone Drive [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 2,670,000     2,670,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,471,000     6,471,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       458,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       268,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,745,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       726,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,745,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,471,000     6,471,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,670,000     2,670,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,471,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,670,000          
Raleigh, NC - 4625 Creekstone Drive [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 4625 Creekstone Drive [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 11000 Weston Parkway [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,900,000     2,900,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 21,984,000     21,984,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,651,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       18,850,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       483,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,651,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       19,333,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,984,000     21,984,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,900,000     2,900,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 21,984,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,900,000          
Raleigh, NC - 11000 Weston Parkway [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 11000 Weston Parkway [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - GlenLake Five [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,004,000     1,004,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 32,527,000     32,527,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       2,263,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       30,264,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,263,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       30,264,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,527,000     32,527,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,004,000     1,004,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 32,527,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,004,000          
Raleigh, NC - GlenLake Five [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - GlenLake Five [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - 11800 Weston Parkway [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 299,000     299,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 14,014,000     14,014,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       826,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       13,188,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       826,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,188,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 14,014,000     14,014,000    
SEC Schedule III, Real Estate Accumulated Depreciation 299,000     299,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 14,014,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 299,000          
Raleigh, NC - 11800 Weston Parkway [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - 11800 Weston Parkway [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - CentreGreen Cafe [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 96,000     96,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,550,000     3,550,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       41,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,509,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       41,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,509,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,550,000     3,550,000    
SEC Schedule III, Real Estate Accumulated Depreciation 96,000     96,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,550,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 96,000          
Raleigh, NC - CentreGreen Cafe [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - CentreGreen Cafe [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - CentreGreen Fitness Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 63,000     63,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,349,000     2,349,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       27,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,322,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       27,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       2,322,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,349,000     2,349,000    
SEC Schedule III, Real Estate Accumulated Depreciation 63,000     63,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,349,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 63,000          
Raleigh, NC - CentreGreen Fitness Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - CentreGreen Fitness Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - One Bank of America Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,222,000     3,222,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 90,068,000     90,068,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       11,288,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       68,375,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,405,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       11,288,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       78,780,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 90,068,000     90,068,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,222,000     3,222,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 90,068,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,222,000          
Raleigh, NC - One Bank of America Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - One Bank of America Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Weston Lakefront I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,209,000     1,209,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 50,789,000     50,789,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       8,522,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       42,267,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       8,522,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       42,267,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 50,789,000     50,789,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,209,000     1,209,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 50,789,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,209,000          
Raleigh, NC - Weston Lakefront I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Weston Lakefront I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Weston Lakefront II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,068,000     1,068,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 54,392,000     54,392,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       8,522,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       45,870,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       8,522,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       45,870,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 54,392,000     54,392,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,068,000     1,068,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 54,392,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,068,000          
Raleigh, NC - Weston Lakefront II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Raleigh, NC - Weston Lakefront II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Raleigh, NC - Other Property [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 8,750,000     8,750,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 19,668,000     19,668,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       26,276,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       16,449,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (24,595,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,538,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,681,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       17,987,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 19,668,000     19,668,000    
SEC Schedule III, Real Estate Accumulated Depreciation 8,750,000     8,750,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 19,668,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 8,750,000          
Richmond, VA - 4900 Cox Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 4,142,000     4,142,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,566,000     9,566,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,324,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       5,311,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       15,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,916,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,339,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,227,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,566,000     9,566,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,142,000     4,142,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,566,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,142,000          
Richmond, VA - 4900 Cox Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - 4900 Cox Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Colonnade Building [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,431,000     2,431,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,182,000     9,182,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,364,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,105,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,713,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,364,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,818,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,182,000     9,182,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,431,000     2,431,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,182,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,431,000          
Richmond, VA - Colonnade Building [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Colonnade Building [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Dominion Place - Pitts Parcel - Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 436,000     436,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,101,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (665,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       436,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 436,000     436,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 436,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - Markel 4521 [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 4,575,000     4,575,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,392,000     13,392,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,581,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       13,299,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       168,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (1,656,000)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,749,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,643,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,392,000     13,392,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,575,000     4,575,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,392,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,575,000          
Richmond, VA - Markel 4521 [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Markel 4521 [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Hamilton Beach/Proctor Silex [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,897,000     3,897,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,747,000     7,747,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,086,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,345,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       10,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,306,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,096,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,651,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,747,000     7,747,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,897,000     3,897,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,747,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,897,000          
Richmond, VA - Hamilton Beach/Proctor Silex [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Hamilton Beach/Proctor Silex [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Highwoods Commons [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,561,000     1,561,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,892,000     4,892,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       521,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       458,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,913,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       979,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,913,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,892,000     4,892,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,561,000     1,561,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,892,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,561,000          
Richmond, VA - Highwoods Commons [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Highwoods Commons [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Highwoods One [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,571,000     5,571,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,991,000     12,991,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,688,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       22,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,281,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,710,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,281,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,991,000     12,991,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,571,000     5,571,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,991,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,571,000          
Richmond, VA - Highwoods One [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Highwoods One [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Highwoods Two [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,947,000     2,947,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,145,000     7,145,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       786,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       226,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,133,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,012,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,133,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,145,000     7,145,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,947,000     2,947,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,145,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,947,000          
Richmond, VA - Highwoods Two [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Highwoods Two [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Highwoods Five [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,485,000     2,485,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,289,000     6,289,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       783,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       11,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,495,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       794,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,495,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,289,000     6,289,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,485,000     2,485,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,289,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,485,000          
Richmond, VA - Highwoods Five [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Highwoods Five [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Highwoods Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,499,000     2,499,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,988,000     6,988,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       909,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       187,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,892,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,096,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,892,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,988,000     6,988,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,499,000     2,499,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,988,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,499,000          
Richmond, VA - Highwoods Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Highwoods Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Innslake Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,238,000     2,238,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,526,000     7,526,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       845,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       195,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,486,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,040,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,486,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,526,000     7,526,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,238,000     2,238,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,526,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,238,000          
Richmond, VA - Innslake Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Innslake Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Highwoods Centre [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,958,000     2,958,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,324,000     7,324,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,205,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,825,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,294,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,205,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,119,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,324,000     7,324,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,958,000     2,958,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,324,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,958,000          
Richmond, VA - Highwoods Centre [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Highwoods Centre [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Markel 4501 [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,360,000     5,360,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,073,000     13,073,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,300,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       13,259,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       213,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (1,699,000)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,513,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,560,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,073,000     13,073,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,360,000     5,360,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,073,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,360,000          
Richmond, VA - Markel 4501 [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Markel 4501 [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Markel 4600 [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 7,621,000     7,621,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 18,901,000     18,901,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,700,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       17,081,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       169,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (49,000)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,869,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       17,032,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 18,901,000     18,901,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,621,000     7,621,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 18,901,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,621,000          
Richmond, VA - Markel 4600 [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Markel 4600 [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - North Park [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,205,000     5,205,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,292,000     13,292,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,163,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       8,659,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       6,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,464,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,169,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,123,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,292,000     13,292,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,205,000     5,205,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,292,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,205,000          
Richmond, VA - North Park [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - North Park [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - North Shore Commons I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,155,000     4,155,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,016,000     13,016,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       951,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       17,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,048,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       968,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,048,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,016,000     13,016,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,155,000     4,155,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,016,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,155,000          
Richmond, VA - North Shore Commons I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - North Shore Commons I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - North Shore Commons II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,123,000     2,123,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,522,000     12,522,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,067,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (89,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       10,544,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,978,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       10,544,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,522,000     12,522,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,123,000     2,123,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,522,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,123,000          
Richmond, VA - North Shore Commons II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - North Shore Commons II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - North Shore Commons C - Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,512,000     1,512,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,497,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       15,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,512,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,512,000     1,512,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,512,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - North Shore Commons D - Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,261,000     1,261,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,261,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,261,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,261,000     1,261,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,261,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - Nuckols Corner Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,462,000     1,462,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,259,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       203,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,462,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,462,000     1,462,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,462,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - One Shockoe Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 7,921,000     7,921,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 16,134,000     16,134,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       356,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       15,778,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       356,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,778,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,134,000     16,134,000    
SEC Schedule III, Real Estate Accumulated Depreciation 7,921,000     7,921,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 16,134,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 7,921,000          
Richmond, VA - One Shockoe Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - One Shockoe Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Pavilion Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 201,000     201,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       181,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       46,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       20,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       (46,000)    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       201,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 201,000     201,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 201,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - Lake Brook Commons [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 2,883,000     2,883,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,674,000     12,674,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,600,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       8,864,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       21,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,189,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,621,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,053,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,674,000     12,674,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,883,000     2,883,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,674,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,883,000          
Richmond, VA - Lake Brook Commons [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Lake Brook Commons [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Sadler & Cox Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,878,000     1,878,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,535,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       343,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,878,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,878,000     1,878,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,878,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - 4840 Cox Road [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 5,704,000     5,704,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 15,835,000     15,835,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,918,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       358,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       13,559,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,276,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,559,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 15,835,000     15,835,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,704,000     5,704,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 15,835,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,704,000          
Richmond, VA - 4840 Cox Road [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - 4840 Cox Road [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Stony Point F Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,067,000     1,067,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,841,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (774,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,067,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,067,000     1,067,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,067,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Richmond, VA - Stony Point I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 6,798,000     6,798,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 16,308,000     16,308,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,384,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       11,630,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (267,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,561,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,117,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       15,191,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,308,000     16,308,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,798,000     6,798,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 16,308,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,798,000          
Richmond, VA - Stony Point I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Stony Point I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Stony Point II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,094,000     5,094,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,427,000     13,427,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,240,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       103,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,084,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,343,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,084,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,427,000     13,427,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,094,000     5,094,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,427,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,094,000          
Richmond, VA - Stony Point II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Stony Point II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Stony Point III [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,407,000     3,407,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 10,931,000     10,931,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       995,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       9,936,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       995,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,936,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 10,931,000     10,931,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,407,000     3,407,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 10,931,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,407,000          
Richmond, VA - Stony Point III [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Stony Point III [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Stony Point IV [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,864,000     2,864,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,258,000     12,258,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       955,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       11,303,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       955,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       11,303,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,258,000     12,258,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,864,000     2,864,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,258,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,864,000          
Richmond, VA - Stony Point IV [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Stony Point IV [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Virginia Mutual [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,658,000     2,658,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 8,514,000     8,514,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,301,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,036,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       15,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,162,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,316,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       7,198,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 8,514,000     8,514,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,658,000     2,658,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 8,514,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,658,000          
Richmond, VA - Virginia Mutual [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Virginia Mutual [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Waterfront Plaza [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,103,000     2,103,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 4,131,000     4,131,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       585,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,347,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       8,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,191,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       593,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       3,538,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 4,131,000     4,131,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,103,000     2,103,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 4,131,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,103,000          
Richmond, VA - Waterfront Plaza [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Waterfront Plaza [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Richmond, VA - Innsbrook Center [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,661,000     2,661,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,557,000     9,557,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       914,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       8,249,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       394,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       914,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       8,643,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,557,000     9,557,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,661,000     2,661,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,557,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,661,000          
Richmond, VA - Innsbrook Center [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Richmond, VA - Innsbrook Center [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - 4200 Cypress [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,225,000     3,225,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 21,815,000     21,815,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,673,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       16,470,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,672,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,673,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       19,142,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 21,815,000     21,815,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,225,000     3,225,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 21,815,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,225,000          
Tampa, FL - 4200 Cypress [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - 4200 Cypress [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Bayshore Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 6,661,000     6,661,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 16,000,000     16,000,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,276,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       11,817,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,907,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,276,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       13,724,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 16,000,000     16,000,000    
SEC Schedule III, Real Estate Accumulated Depreciation 6,661,000     6,661,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 16,000,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 6,661,000          
Tampa, FL - Bayshore Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Bayshore Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - General Services Administration [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 9,040,000     9,040,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 31,993,000     31,993,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       4,054,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       406,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       27,533,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       4,460,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       27,533,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 31,993,000     31,993,000    
SEC Schedule III, Real Estate Accumulated Depreciation 9,040,000     9,040,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 31,993,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 9,040,000          
Tampa, FL - General Services Administration [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - General Services Administration [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Highwoods Preserve Building I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 9,238,000     9,238,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 23,588,000     23,588,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       991,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       22,597,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       991,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       22,597,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 23,588,000     23,588,000    
SEC Schedule III, Real Estate Accumulated Depreciation 9,238,000     9,238,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 23,588,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 9,238,000          
Tampa, FL - Highwoods Preserve Building I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Highwoods Preserve Building I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Highwoods Preserve Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 1,970,000     1,970,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,485,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       485,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,970,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 1,970,000     1,970,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 1,970,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Tampa, FL - Highwoods Preserve Building V [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 9,844,000     9,844,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 26,242,000     26,242,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       881,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       25,361,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       881,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       25,361,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 26,242,000     26,242,000    
SEC Schedule III, Real Estate Accumulated Depreciation 9,844,000     9,844,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 26,242,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 9,844,000          
Tampa, FL - Highwoods Preserve Building V [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Highwoods Preserve Building V [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Highwoods Bay Center I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 8,540,000     8,540,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 40,181,000     40,181,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,565,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (64,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       36,680,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,501,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       36,680,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 40,181,000     40,181,000    
SEC Schedule III, Real Estate Accumulated Depreciation 8,540,000     8,540,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 40,181,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 8,540,000          
Tampa, FL - Highwoods Bay Center I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Highwoods Bay Center I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - HIW Bay Center II Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 3,482,000     3,482,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,482,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,482,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 3,482,000     3,482,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 3,482,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Tampa, FL - HIW Preserve Building VII [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 2,730,000     2,730,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 13,288,000     13,288,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       790,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       12,498,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       790,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,498,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 13,288,000     13,288,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,730,000     2,730,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 13,288,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,730,000          
Tampa, FL - HIW Preserve Building VII [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - HIW Preserve Building VII [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - HIW Preserve VII Garage [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,513,000     1,513,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 6,789,000     6,789,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,789,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,789,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 6,789,000     6,789,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,513,000     1,513,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 6,789,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,513,000          
Tampa, FL - HIW Preserve VII Garage [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - HIW Preserve VII Garage [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Horizon [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,583,000     4,583,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 9,584,000     9,584,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       6,257,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,327,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,584,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 9,584,000     9,584,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,583,000     4,583,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 9,584,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,583,000          
Tampa, FL - Horizon [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Horizon [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - LakePointe One [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 17,726,000     17,726,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 46,205,000     46,205,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,106,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       89,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       44,010,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,106,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       44,099,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 46,205,000     46,205,000    
SEC Schedule III, Real Estate Accumulated Depreciation 17,726,000     17,726,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 46,205,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 17,726,000          
Tampa, FL - LakePointe One [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - LakePointe One [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - LakePointe Two [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 9,845,000     9,845,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 32,736,000     32,736,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,000,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       15,848,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       672,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       14,216,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,672,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       30,064,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 32,736,000     32,736,000    
SEC Schedule III, Real Estate Accumulated Depreciation 9,845,000     9,845,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 32,736,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 9,845,000          
Tampa, FL - LakePointe Two [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - LakePointe Two [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Lakeside [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 4,169,000     4,169,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,276,000     12,276,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       7,369,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,907,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,276,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,276,000     12,276,000    
SEC Schedule III, Real Estate Accumulated Depreciation 4,169,000     4,169,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,276,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 4,169,000          
Tampa, FL - Lakeside [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Lakeside [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Lakeside/Parkside Garage [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,255,000     1,255,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,587,000     5,587,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,587,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,587,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,587,000     5,587,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,255,000     1,255,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,587,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,255,000          
Tampa, FL - Lakeside/Parkside Garage [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Lakeside/Parkside Garage [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - One Harbour Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 12,161,000     12,161,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 34,375,000     34,375,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,016,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       25,252,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       7,107,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,016,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       32,359,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 34,375,000     34,375,000    
SEC Schedule III, Real Estate Accumulated Depreciation 12,161,000     12,161,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 34,375,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 12,161,000          
Tampa, FL - One Harbour Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - One Harbour Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Parkside [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 5,740,000     5,740,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 12,430,000     12,430,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       9,407,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       3,023,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       12,430,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 12,430,000     12,430,000    
SEC Schedule III, Real Estate Accumulated Depreciation 5,740,000     5,740,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 12,430,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 5,740,000          
Tampa, FL - Parkside [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Parkside [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Pavilion [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 8,885,000     8,885,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 20,411,000     20,411,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       16,394,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,017,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       20,411,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 20,411,000     20,411,000    
SEC Schedule III, Real Estate Accumulated Depreciation 8,885,000     8,885,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 20,411,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 8,885,000          
Tampa, FL - Pavilion [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Pavilion [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Pavilion Parking Garage [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,288,000     2,288,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 5,682,000     5,682,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       5,682,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       5,682,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 5,682,000     5,682,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,288,000     2,288,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 5,682,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,288,000          
Tampa, FL - Pavilion Parking Garage [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Pavilion Parking Garage [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Spectrum [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 9,450,000     9,450,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 22,433,000     22,433,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,454,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       14,502,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       6,477,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,454,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       20,979,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,433,000     22,433,000    
SEC Schedule III, Real Estate Accumulated Depreciation 9,450,000     9,450,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 22,433,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 9,450,000          
Tampa, FL - Spectrum [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Spectrum [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Tower Place [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 11,089,000     11,089,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 27,486,000     27,486,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       3,218,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       19,898,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,370,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       3,218,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       24,268,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 27,486,000     27,486,000    
SEC Schedule III, Real Estate Accumulated Depreciation 11,089,000     11,089,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 27,486,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 11,089,000          
Tampa, FL - Tower Place [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Tower Place [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Westshore Square [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 3,161,000     3,161,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 7,970,000     7,970,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,126,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       5,186,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,658,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,126,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       6,844,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 7,970,000     7,970,000    
SEC Schedule III, Real Estate Accumulated Depreciation 3,161,000     3,161,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 7,970,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 3,161,000          
Tampa, FL - Westshore Square [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Westshore Square [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Independence Park Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 0     0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       4,943,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       (4,943,000)    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       0    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       0    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 0     0    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 0          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance 0          
Tampa, FL - Independence Park I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation 2,219,000     2,219,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 11,934,000     11,934,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       2,531,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       4,526,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       4,877,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,531,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       9,403,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 11,934,000     11,934,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,219,000     2,219,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 11,934,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,219,000          
Tampa, FL - Independence Park I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Independence Park I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Meridian I [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,222,000     2,222,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 25,514,000     25,514,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,849,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       22,363,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       1,302,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,849,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       23,665,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 25,514,000     25,514,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,222,000     2,222,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 25,514,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,222,000          
Tampa, FL - Meridian I [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Meridian I [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Meridian II [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 2,278,000     2,278,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 22,894,000     22,894,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       1,302,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       19,588,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,004,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,302,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       21,592,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 22,894,000     22,894,000    
SEC Schedule III, Real Estate Accumulated Depreciation 2,278,000     2,278,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 22,894,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 2,278,000          
Tampa, FL - Meridian II [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Meridian II [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Suntrust Financial Centre [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,298,000     1,298,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 104,118,000     104,118,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       1,980,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       102,138,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       1,980,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       102,138,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 104,118,000     104,118,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,298,000     1,298,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 104,118,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,298,000          
Tampa, FL - Suntrust Financial Centre [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Suntrust Financial Centre [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Tampa, FL - Suntrust Financial Land [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 0     0    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III 2,242,000     2,242,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       0    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       0    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       2,225,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       17,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       2,225,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       17,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets 2,242,000     2,242,000    
SEC Schedule III, Real Estate Accumulated Depreciation 0     0    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance 2,242,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 0          
Tampa, FL - Suntrust Financial Land [Member] | Minimum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 5 years          
Tampa, FL - Suntrust Financial Land [Member] | Maximum [Member]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Life Used For Depreciation 40 years          
Total Real Estate and Accumulated Depreciation [Member]            
Reconciliation of Total Accumulated Depreciation to Balance Sheet [Abstract]            
SEC Schedule III, Real Estate Accumulated Depreciation $ 1,138,378,000     1,138,378,000    
Reconciliation of Total Real Estate Assets to Balance Sheet [Abstract]            
Total real estate assets per Schedule III [2] 4,915,858,000     4,915,858,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost [Abstract]            
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Land       506,874,000    
SEC Schedule III, Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements       2,171,535,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition [Abstract]            
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Land       22,845,000    
Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Buildings and Improvements       2,214,604,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period [Abstract]            
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Land       529,719,000    
Real Estate and Accumulated Depreciation, Gross Value at Close of Period, Buildings and Improvements       4,386,139,000    
Real Estate and Accumulated Depreciation,Gross Value at Close of Period, Total Assets [2] 4,915,858,000     4,915,858,000    
SEC Schedule III, Real Estate Accumulated Depreciation 1,138,378,000     $ 1,138,378,000    
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]            
Real estate assets, ending balance [2] 4,915,858,000          
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]            
Accumulated depreciation, ending balance $ 1,138,378,000          
[1] These assets are pledged as collateral for a $112.2 million first mortgage loan.
[2] The tax basis of aggregate land and buildings and tenant improvements as of December 31, 2015 is $4.5 billion.