Condensed Statements of Operations (Unaudited) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Condensed Statements of Operations [Abstract]
Number of participant units	$ 5,000	$ 5,000	$ 5,000	$ 5,000
Participation units outstanding	720	720	720	720