Income Taxes (Detail) - Federal Taxable Income Reconciliation (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net Income for Financial Reporting Purposes	$ 825,072	$ 577,661
Depreciation for Tax Purposes Under Depreciation and Amortization for Financial Reporting Purposes	136,969	111,270
Income Accrued for Tax Purposes Over (Under) Income for Financial Reporting Purposes	(27,731)	1,935
Acquisition Costs Expensed for Financial Reporting Purposes, Capitalized for Tax Purposes	28,135	0
Taxable Income to Members	$ 962,445	$ 690,866