Schedule III - Real Estate and Accumulated Depreciation (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	3,778,883
Initial cost to company, Building & Improvements	2,534,393
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	6,313,276
Accumulated depreciation	2,301,627
Rancho California, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	384,400
Initial cost to company, Building & Improvements	257,807
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	642,207
Accumulated depreciation	234,134
Date of construction	1986
Date acquired	1986
Vista, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	512,130
Initial cost to company, Building & Improvements	343,471
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	855,601
Accumulated depreciation	311,923
Date of construction	1987
Date acquired	1987
Perris, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	437,522
Initial cost to company, Building & Improvements	293,434
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	730,956
Accumulated depreciation	266,484
Date of construction	1987
Date acquired	1987
Upland, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	281,827
Initial cost to company, Building & Improvements	189,014
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	470,841
Accumulated depreciation	171,648
Date of construction	1987
Date acquired	1987
Walnut, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	340,848
Initial cost to company, Building & Improvements	228,597
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	569,445
Accumulated depreciation	207,597
Date of construction	1988
Date acquired	1988
Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	674,283
Initial cost to company, Building & Improvements	452,223
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	1,126,506
Accumulated depreciation	410,688
Date of construction	1988
Date acquired	1988
Chatsworth, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	642,475
Initial cost to company, Building & Improvements	430,890
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	1,073,365
Accumulated depreciation	391,322
Date of construction	1989
Date acquired	1989
Victorville, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Encumbrances
Initial cost to company, Land & land improvements	505,398
Initial cost to company, Building & Improvements	338,957
Cost capitalized subsequent to acquisition, Carrying costs
Gross amount at which carried at close of period, Land, buildings & improvements Total	844,355
Accumulated depreciation	$ 307,831
Date of construction	1989
Date acquired	1989
Land improvements [Member] | Rancho California, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	20 years
Land improvements [Member] | Vista, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	20 years
Land improvements [Member] | Perris, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	20 years
Land improvements [Member] | Upland, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	20 years
Land improvements [Member] | Walnut, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	20 years
Land improvements [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	20 years
Land improvements [Member] | Chatsworth, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	20 years
Land improvements [Member] | Victorville, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	20 years
Building Improvements [Member] | Rancho California, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	35 years
Building Improvements [Member] | Vista, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	35 years
Building Improvements [Member] | Perris, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	35 years
Building Improvements [Member] | Upland, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	35 years
Building Improvements [Member] | Walnut, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	35 years
Building Improvements [Member] | Los Angeles, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	35 years
Building Improvements [Member] | Chatsworth, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	35 years
Building Improvements [Member] | Victorville, CA [Member]
Real Estate and Accumulated Depreciation [Line Items]
Life on which depreciation in latest income statement is computed	35 years