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Condensed Statement of Changes in Partners' Capital (Unaudited) (Parenthetical) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Condensed Statement of Changes in Partners' Capital (Unaudited)        
Addition of partnership shares 2,700,000 300,000 45,850,000 950,000
Redemption of partnership shares (7,700,000) (850,000) (16,500,000) (1,550,000)