Statements of Financial Condition (Parenthetical) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Limited Partners, Units	3,012,664.055	3,285,860.484
General Partner, Units	32,332.233	38,316.597
U.S. Treasury Bills [Member]
Investments in U.S. Treasury bills, amortized cost	$ 15,992,566	$ 55,497,357