Statements of Members' Capital (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Increase (Decrease) in Partners' Capital [Roll Forward]
Investor Member Shares, outstanding, beginning of period	51,854
Members Capital, beginning of period	$ 39,121,909	$ 42,267,776	$ 42,267,776
Net Loss	(706,058)	(943,794)	(3,145,867)
Investor Member Shares, outstanding, end of period	51,854		51,854
Members Capital, end of period	38,415,851		39,121,909
Sponsoring Member [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Members Capital, beginning of period	959,727	959,727	959,727
Net Loss	0		0
Members Capital, end of period	959,727		959,727
Investor Members [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Investor Member Shares, outstanding, beginning of period	51,854	51,854	51,854
Members Capital, beginning of period	38,162,182	41,308,049	41,308,049
Net Loss	(706,058)		(3,145,867)
Investor Member Shares, outstanding, end of period	51,854		51,854
Members Capital, end of period	$ 37,456,124		$ 38,162,182