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Statements of Changes in Partners' Capital - USD ($)
Total
General Partner [Member]
Limited Partners [Member]
Balances at Dec. 31, 2015 $ 13,125,103 $ 0 $ 13,125,103
Addition of partnership shares 1,418,858 0 1,418,858
Redemption of partnership shares (967,707) 0 (967,707)
Net income (loss) 2,869,424 0 2,869,424
Balances at Dec. 31, 2016 $ 16,445,678 0 16,445,678
Net asset value, beginning of year at Dec. 31, 2015 $ 9.72    
Net asset value, end of year at Dec. 31, 2016 $ 11.75    
Addition of partnership shares $ 1,021,619 0 1,021,619
Redemption of partnership shares (5,986,374) 0 (5,986,374)
Net income (loss) (3,146,483) 0 (3,146,483)
Balances at Dec. 31, 2017 $ 8,334,440 0 8,334,440
Net asset value, end of year at Dec. 31, 2017 $ 9.26    
Addition of partnership shares $ 584,722 0 584,722
Redemption of partnership shares (3,843,434) 0 (3,843,434)
Net income (loss) 567,143 0 567,143
Balances at Dec. 31, 2018 $ 5,642,871 $ 0 $ 5,642,871
Net asset value, end of year at Dec. 31, 2018 $ 10.26