Statements of Changes in Partners' Capital - USD ($)
Total
General Partner [Member]
Limited Partner [Member]
Balances at Dec. 31, 2013 $ 26,288,343 $ 0 $ 26,288,343
Addition of partnership shares 77,749,293 0 77,749,293
Redemption of partnership shares (36,166,377) 0 (36,166,377)
Net income (loss) (26,451,869) 0 (26,451,869)
Balances at Dec. 31, 2014 $ 41,419,390 0 41,419,390
Net asset value, beginning of year at Dec. 31, 2013 $ 43.81    
Net asset value, end of year at Dec. 31, 2014 $ 22.39    
Addition of partnership shares $ 123,526,846 0 123,526,846
Redemption of partnership shares (38,808,966) 0 (38,808,966)
Net income (loss) (43,645,160) 0 (43,645,160)
Balances at Dec. 31, 2015 $ 82,492,110 0 82,492,110
Net asset value, end of year at Dec. 31, 2015 $ 12.22    
Addition of partnership shares $ 39,802,240 0 39,802,240
Redemption of partnership shares (46,276,406) 0 (46,276,406)
Net income (loss) 37,005,128 0 37,005,128
Balances at Dec. 31, 2016 $ 113,023,072 $ 0 $ 113,023,072
Net asset value, end of year at Dec. 31, 2016 $ 15.70