AFS and/ or Affiliates Earned Fees, Commissions, and Billed for Reimbursements Pursuant to Operating Agreement (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Related Party Transaction [Line Items]
Asset management fees to Managing Member	$ 40	$ 48	$ 89	$ 92
Cost reimbursements to Managing Member	73		289	679
Related Party Transaction, Amounts of Transaction, Total	$ 113	$ 48	$ 378	$ 771