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Condensed Statement of Changes in Partners' Capital - USD ($)
Total
General Partner
Limited Partners
Net income (loss) $ (11,209,791)    
Net asset value, beginning of period at Dec. 31, 2016 $ 20.39    
Net asset value, end of period at Sep. 30, 2017 $ 18.31    
Beginning Balances at Dec. 31, 2017 $ 91,553,902 $ 0 $ 91,553,902
Redemption of 1,300,000 partnership shares (30,043,941) 0 (30,043,941)
Net income (loss) 21,270,646 0 21,270,646
Ending Balances at Sep. 30, 2018 $ 82,780,607 $ 0 $ 82,780,607
Net asset value, beginning of period at Dec. 31, 2017 $ 21.05    
Net asset value, end of period at Sep. 30, 2018 $ 27.14