Statements of Financial Condition (Parenthetical) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Limited Partners, Units (in units)	3,467,677.384	3,861,976.161
General Partner, Units (in units)	38,316.597	43,497.666
U.S. Treasury Bills [Member]
Investments in U.S. Treasury bills, Amortized cost	$ 27,949,571	$ 0