Supervisory Services - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Related Party Transaction [Line Items]
Basic annual fee	$ 24,000
Prior basic supervisory fee per month	2,000
Additional Payment of distributions received by the Participants	10.00%
Required rate of return on cash investment for Additional Payment	14.00%
Original cash investment	7,000,000
Supervisory service fees	49,135	48,478
Advance against additional rent paid to Supervisors	7,380
Professional fees, including amounts for services provided by related party	367,600	85,680
Due to Supervisor	424,614		789,033
Due from Supervisor	87,202		87,202
Effective July 1, 2010 [Member]
Related Party Transaction [Line Items]
Increase in Basic Payment plus annual Consumer Price Index adjustment	180,000
Effective July 1, 2012 [Member]
Related Party Transaction [Line Items]
Increase in Basic Payment plus annual Consumer Price Index adjustment	189,158
Supervisor [Member]
Related Party Transaction [Line Items]
Due to Supervisor	425,614		789,033
Due from Supervisor	87,202		87,202
Supervisor [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Monthly basic supervisory fees	2,000
Registrant [Member]
Related Party Transaction [Line Items]
Supervisory service fees	49,135	48,478
Professional fees, including amounts for services provided by related party	$ 83,271	$ 49,099