Schedule III - Real Estate and Accumulated Depreciation (Detail) (USD $) | 12 Months Ended | | | |
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | $0 | | | |
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 | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 6,313,276 | 6,313,276 | 6,313,276 | 6,313,276 |
Accumulated depreciation | 2,446,451 | 2,374,039 | 2,301,627 | 2,229,215 |
Rancho California, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | 0 | | | |
Initial cost to company, Land & land improvements | 384,400 | | | |
Initial cost to company, Building & Improvements | 257,807 | | | |
Cost capitalized subsequent to acquisition, Carrying costs | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 642,207 | | | |
Accumulated depreciation | 248,866 | | | |
Date of construction | 1986 | | | |
Date acquired | 1986 | | | |
Vista, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | 0 | | | |
Initial cost to company, Land & land improvements | 512,130 | | | |
Initial cost to company, Building & Improvements | 343,471 | | | |
Cost capitalized subsequent to acquisition, Carrying costs | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 855,601 | | | |
Accumulated depreciation | 331,549 | | | |
Date of construction | 1987 | | | |
Date acquired | 1987 | | | |
Perris, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | 0 | | | |
Initial cost to company, Land & land improvements | 437,522 | | | |
Initial cost to company, Building & Improvements | 293,434 | | | |
Cost capitalized subsequent to acquisition, Carrying costs | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 730,956 | | | |
Accumulated depreciation | 283,252 | | | |
Date of construction | 1987 | | | |
Date acquired | 1987 | | | |
Upland, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | 0 | | | |
Initial cost to company, Land & land improvements | 281,827 | | | |
Initial cost to company, Building & Improvements | 189,014 | | | |
Cost capitalized subsequent to acquisition, Carrying costs | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 470,841 | | | |
Accumulated depreciation | 182,448 | | | |
Date of construction | 1987 | | | |
Date acquired | 1987 | | | |
Walnut, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | 0 | | | |
Initial cost to company, Land & land improvements | 340,848 | | | |
Initial cost to company, Building & Improvements | 228,597 | | | |
Cost capitalized subsequent to acquisition, Carrying costs | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 569,445 | | | |
Accumulated depreciation | 220,659 | | | |
Date of construction | 1988 | | | |
Date acquired | 1988 | | | |
Los Angeles, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | 0 | | | |
Initial cost to company, Land & land improvements | 674,283 | | | |
Initial cost to company, Building & Improvements | 452,223 | | | |
Cost capitalized subsequent to acquisition, Carrying costs | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 1,126,506 | | | |
Accumulated depreciation | 436,530 | | | |
Date of construction | 1988 | | | |
Date acquired | 1988 | | | |
Chatsworth, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | 0 | | | |
Initial cost to company, Land & land improvements | 642,475 | | | |
Initial cost to company, Building & Improvements | 430,890 | | | |
Cost capitalized subsequent to acquisition, Carrying costs | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 1,073,365 | | | |
Accumulated depreciation | 415,946 | | | |
Date of construction | 1989 | | | |
Date acquired | 1989 | | | |
Victorville, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Encumbrances | 0 | | | |
Initial cost to company, Land & land improvements | 505,398 | | | |
Initial cost to company, Building & Improvements | 338,957 | | | |
Cost capitalized subsequent to acquisition, Carrying costs | 0 | | | |
Gross amount at which carried at close of period, Land, buildings & improvements Total | 844,355 | | | |
Accumulated depreciation | $327,201 | | | |
Date of construction | 1989 | | | |
Date acquired | 1989 | | | |
Land improvements [Member] | Rancho California, CA [Member] | | | | |
SEC Schedule III, 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] | | | | |
SEC Schedule III, 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] | | | | |
SEC Schedule III, 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] | | | | |
SEC Schedule III, 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] | | | | |
SEC Schedule III, 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] | | | | |
SEC Schedule III, 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] | | | | |
SEC Schedule III, 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] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 20 years | | | |
Buildings and improvements [Member] | Rancho California, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 35 years | | | |
Buildings and improvements [Member] | Vista, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 35 years | | | |
Buildings and improvements [Member] | Perris, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 35 years | | | |
Buildings and improvements [Member] | Upland, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 35 years | | | |
Buildings and improvements [Member] | Walnut, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 35 years | | | |
Buildings and improvements [Member] | Los Angeles, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 35 years | | | |
Buildings and improvements [Member] | Chatsworth, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 35 years | | | |
Buildings and improvements [Member] | Victorville, CA [Member] | | | | |
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items] | | | | |
Life on which depreciation in latest income statement is computed | 35 years | | | |