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Condensed Statement of Changes in Partners' Capital - USD ($)
Total
General Partner
Limited Partners
Net income (loss) $ (11,146,943)    
Net asset value, beginning of period at Dec. 31, 2016 $ 20.39    
Net asset value, end of period at Mar. 31, 2017 $ 18.52    
Beginning Balances at Dec. 31, 2017 $ 91,553,902 $ 0 $ 91,553,902
Redemption of 700,000 partnership shares (15,336,666) 0 (15,336,666)
Net income (loss) 6,464,056 0 6,464,056
Ending Balances at Mar. 31, 2018 $ 82,681,292 $ 0 $ 82,681,292
Net asset value, beginning of period at Dec. 31, 2017 $ 21.05    
Net asset value, end of period at Mar. 31, 2018 $ 22.65