Distributions and Amount of Income Per Ten Thousand Participation Unit - Schedule of Distributions and Amount of Income Per Participation Unit (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Distribution Made to Member or Limited Partner [Line Items]
Income	$ 5,338	$ 1,495
Return of capital	275
Total distributions	$ 5,613	$ 1,495