Income Taxes (Detail) - Federal Tax Partners' Capital (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Members’ Equity for Financial Reporting Purposes	$ 13,199,505	$ 13,650,477
Adjusted Tax Basis of Investments in Real Estate Over Net Investments in Real Estate for Financial Reporting Purposes	703,775	538,671
Income Accrued for Tax Purposes Over (Under) Income for Financial Reporting Purposes	0	27,731
Syndication Costs Treated as Reduction of Capital For Financial Reporting Purposes	2,691,997	2,691,997
Members’ Equity for Tax Reporting Purposes	$ 16,595,277	$ 16,908,876