Transactions with General Partner and its Affiliates - Amounts paid and/or accrued to the General Partner and its Affiliates (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Equity Transactions And Share Based Compensation [Line Items]
Management fees	$ 64,734	$ 63,420	$ 128,592	$ 125,504
Restoration fees			0	40
Other outsourced administrative fees	0	0	0	40
Cash distribution			202,407
General Partner [Member]
Equity Transactions And Share Based Compensation [Line Items]
Management fees	64,734	63,420	128,592	125,504
Restoration fees	0	0	0	40
Overhead allowance	5,223	5,115	10,374	10,126
Other outsourced administrative fees	600	4,400	4,950	6,200
Sales Commission	16,296	0	16,296	0
Reimbursement for out-of-pocket expenses	1,583	2,033	3,018	3,868
Cash distribution	1,696	227	1,803	444
Total general partner	$ 90,132	$ 75,195	$ 165,033	$ 146,182