Income Taxes (Detail) - Federal Taxable Income Reconciliation (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net Income for Financial Reporting Purposes	$ 662,666	$ 1,113,264
Depreciation for Tax Purposes Under Depreciation for Financial Reporting Purposes	146,997	126,168
Income Accrued for Tax Purposes Under Income for Financial Reporting Purposes	(9,768)	(5,122)
Gain on Sale of Real Estate for Tax Purposes Over Gain for Financial Reporting Purposes	1,621	33,870
Taxable Income to Partners	$ 801,516	$ 1,268,180