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Statements of Changes in Shareholders' Equity and Redeemable Capital Shares - USD ($)
Total
Retained Earnings
Redeemable Capital Shares
Balance at Dec. 31, 2021     $ 171,153,887
Balance, Shares at Dec. 31, 2021     2,100,000
Purchases of Shares     $ 44,487,307
Purchases of Shares, Shares     550,000
Redemption of Shares     $ (28,431,795)
Redemption of Shares, Shares     (350,000)
Net Increase (Decrease) due to Share Transactions     $ 16,055,512
Net Increase (Decrease) due to Share Transactions, Shares     200,000
Net Comprehensive Income (Loss) $ (268,685) $ (268,685)  
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings 268,685 268,685 $ (268,685)
Adjustment of Redeemable Capital Shares to Redemption Value     (9,355,207)
Balance at Mar. 31, 2022     $ 177,585,507
Balance, Shares at Mar. 31, 2022     2,300,000
Balance at Dec. 31, 2022 $ 187,364,894   $ 187,364,894
Balance, Shares at Dec. 31, 2022 2,650,000   2,650,000
Purchases of Shares     $ 74,706,667
Purchases of Shares, Shares     1,050,000
Redemption of Shares     $ (38,567,749)
Redemption of Shares, Shares     (550,000)
Net Increase (Decrease) due to Share Transactions     $ 36,138,918
Net Increase (Decrease) due to Share Transactions, Shares     500,000
Net Comprehensive Income (Loss) $ (338,608) (338,608)  
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings 338,608 $ 338,608 $ (338,608)
Adjustment of Redeemable Capital Shares to Redemption Value     (2,690,402)
Balance at Mar. 31, 2023 $ 220,474,802   $ 220,474,802
Balance, Shares at Mar. 31, 2023 3,150,000   3,150,000