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Statements of Operations - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Gain (loss) on trading of commodity futures contracts:      
Realized gain (loss) on closed commodity futures contracts $ 112,107,560 $ 76,578,011 $ (5,665,084)
Change in unrealized gain (loss) on open commodity futures contracts (17,234,420) 33,279,859 19,374,784
Realized gain (loss) on short-term investments 0 1,240 0
Dividend income 29,830 158,704 241,099
Interest income [1] 32,668 252,605 976,513
ETF transaction fees 14,350 33,264 4,550
Total Income (Loss) 94,949,988 110,303,683 14,931,862
Expenses      
General Partner management fees (Note 3) 1,074,705 1,080,769 337,314
Professional fees 288,152 231,301 131,501
Brokerage commissions 26,177 102,980 7,261
Directors' fees and insurance 46,172 17,435 13,028
License fees 26,868 27,019 8,433
Registration fees 151,475 124,835 0
Total Expenses 1,613,549 1,584,339 497,537
Net Income (Loss) $ 93,336,439 $ 108,719,344 $ 14,434,325
Net Income (Loss) per limited partner share $ 10.58 $ (5.72) $ 5.13
Net Income (Loss) per weighted average limited partner share $ 12.18 $ 8.83 $ 5.52
Weighted average limited partner shares outstanding 7,662,329 12,315,890 2,615,479
[1] Interest income does not exceed paid in kind of 5%