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Statement of Changes in Shareholders' Equity and Redeemable Capital Shares - USD ($)
Total
Retained Earnings [Member]
Redeemable Capital Shares [Member]
Balance at Dec. 31, 2021     $ 211,443,880
Balance, Shares at Dec. 31, 2021     2,000,000
Purchases of Shares     $ 703,013,411
Purchases of Shares, Shares     7,350,000
Redemption of Shares     $ (622,725,114)
Redemption of Shares, Shares     (6,450,000)
Net Increase (Decrease) due to Share Transactions     $ 80,288,297
Net Increase (Decrease) due to Share Transactions, Shares     900,000
Distributions $ (57,109) $ (57,109)  
Net Comprehensive Income (Loss) (1,785,713) (1,785,713)  
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings 1,842,822 1,842,822 $ (1,842,822)
Adjustment of Redeemable Capital Shares to Redemption Value     (4,282,894)
Balance at Dec. 31, 2022 $ 285,606,461   $ 285,606,461
Balance, Shares at Dec. 31, 2022 2,900,000   2,900,000
Purchases of Shares     $ 154,345,855
Purchases of Shares, Shares     1,550,000
Redemption of Shares     $ (229,147,352)
Redemption of Shares, Shares     (2,300,000)
Net Increase (Decrease) due to Share Transactions     $ (74,801,497)
Net Increase (Decrease) due to Share Transactions, Shares     (750,000)
Distributions $ (3,825,434) (3,825,434)  
Net Comprehensive Income (Loss) 4,268,764 4,268,764  
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings (443,330) $ (443,330) $ 443,330
Adjustment of Redeemable Capital Shares to Redemption Value     8,312,345
Balance at Dec. 31, 2023 $ 219,560,639   $ 219,560,639
Balance, Shares at Dec. 31, 2023 2,150,000   2,150,000