Real Estate Assets (Summary of Properties Owned) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Real Estate And Accumulated Depreciation [Line Items]
Real Estate Assets Owned	$ 240,522,209	$ 231,086,179
Havana Parker [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Jun. 01, 2006
Location	Aurora, CO
Real Estate Assets Owned		2,093,000
Garden Gateway Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Mar. 01, 2007
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 11,656,000	11,808,000
World Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Sep. 01, 2007
Location	San Bernardino, California
Real Estate Assets Owned	$ 5,750,000	6,653,000
Regatta Square [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Oct. 01, 2007
Location	Denver, Colorado
Real Estate Assets Owned	$ 1,836,000	1,859,000
Executive Office Park [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Jul. 01, 2008
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 8,125,000	8,227,000
Waterman Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Aug. 01, 2008
Location	San Bernardino, California
Real Estate Assets Owned	$ 5,753,000	5,877,000
Pacific Oaks Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Sep. 01, 2008
Location	Escondido, California
Real Estate Assets Owned	$ 4,146,000	4,213,000
Morena Office Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Jan. 01, 2009
Location	San Diego, California
Real Estate Assets Owned	$ 5,079,000	5,269,000
Rangewood Medical Office Building [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Mar. 01, 2009
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 2,054,000	2,306,000
Genesis Plaza [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Aug. 01, 2010
Location	San Diego, California
Real Estate Assets Owned	$ 8,670,000	8,398,000
Dakota Bank Buildings [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	May 01, 2011
Location	Fargo, North Dakota
Real Estate Assets Owned	$ 10,148,000	10,452,000
Bismarck Office Building [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Mar. 01, 2014
Location	Fargo, ND
Real Estate Assets Owned	$ 5,392,000	4,904,000
Yucca Valley Retail Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Sep. 01, 2011
Location	Yucca Valley, California
Real Estate Assets Owned	$ 6,738,000	7,190,000
Port of San Diego Complex [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Dec. 01, 2011
Location	San Diego, California
Real Estate Assets Owned	$ 14,153,000	13,971,000
Shoreline Medical Building [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	May 01, 2012
Location	Half Moon Bay, California
Real Estate Assets Owned	$ 5,821,000	5,856,000
The Presidio [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Nov. 01, 2012
Location	Aurora, Colorado
Real Estate Assets Owned	$ 6,609,000	6,643,000
West Fargo Industrial [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Aug. 01, 2015
Location	Fargo, North Dakota
Real Estate Assets Owned	$ 7,632,000	2,875,000
300 N.P. [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Aug. 01, 2015
Location	Fargo, North Dakota
Real Estate Assets Owned	$ 3,751,000	7,833,000
Union Terrace [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Aug. 01, 2014
Location	Lakewood, Colorado
Real Estate Assets Owned	$ 8,276,000	8,607,000
One Parke Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Aug. 01, 2015
Location	Westminster, Colorado
Real Estate Assets Owned	$ 8,515,000	13,245,000
Centennial Tech Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Dec. 01, 2014
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 14,157,000	14,755,000
Highland Court [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Aug. 01, 2015
Location	Centennial, Colorado
Real Estate Assets Owned	$ 12,511,000	9,050,000
Arapahoe Service Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Dec. 01, 2014
Location	Centennial, Colorado
Real Estate Assets Owned	$ 11,207,000	11,301,000
Shea Center II [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Dec. 01, 2015
Location	Highlands Ranch, Colorado
Real Estate Assets Owned	$ 24,409,000	25,961,000
Union Town Center [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Dec. 01, 2014
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 10,544,000	10,941,000
NetREIT, Inc. Properties [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate Assets Owned	$ 205,708,000	214,197,000
Research Parkway [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Aug. 01, 2015
Location	Colorado Springs, Colorado
Real Estate Assets Owned	$ 2,776,000	3,910,000
Model Home Properties [Member]
Real Estate And Accumulated Depreciation [Line Items]
Real Estate Assets Owned	$ 34,814,000	$ 16,889,000
Model Home Properties [Member] | Minimum [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Jan. 01, 2011
Model Home Properties [Member] | Maximum [Member]
Real Estate And Accumulated Depreciation [Line Items]
Date acquired	Jan. 01, 2016