Balance Sheets (Parenthetical)	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010
Statement Of Financial Position [Abstract]
Limited partners, units outstanding	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751	8,751