Members' Capital (Detail) (USD $)	12 Months Ended		69 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011	Mar. 15, 2005
Partners' Capital Account, Distributions	$ 1,033,938	$ 944,330
Limited Member [Member]
Distribution Made to Member or Limited Partner, Cash Distributions Paid	1,007,598	916,000
Distributions Per Limited Partnership Unit Outstanding, Basic (in Dollars per share)	$ 0.56	$ 0.50
Weighted Average Limited Partnership Units Outstanding, Basic (in Shares)	1,812,131	1,827,736
DistributionsPerUnitOfNetIncome (in Dollars per Item)	0.28	0.31
DistributionsPerUnitOfReturnOfCapital (in Dollars per Item)	0.28	0.19
SaleProceedsDistributionMadeToMemberOrLimitedPartner	231,600
Partners' Capital Account, Units, Redeemed (in Shares)	34,811.0		5,000.0
Limited Partner Capital Accounts Redemptions	234,843		38,225
AdjustedCapitalContributionsPerPartnershipAgreement	10.22
Capital Units, Value				10
Managing Member [Member]
General Partners' Capital Account, Period Distribution Amount	26,340	28,330
GeneralPartnerDistributionsFromRedemptions	$ 7,263