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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, 2020     $ 246,926,201
Balance, Shares at Dec. 31, 2020     2,700,000
Purchases of Shares     $ 4,541,369
Purchases of Shares, Shares     50,000
Redemption of Shares     $ (48,242,779)
Redemption of Shares, Shares     (550,000)
Net Increase (Decrease) due to Share Transactions     $ (43,701,410)
Net Increase (Decrease) due to Share Transactions, Shares     (500,000)
Net Comprehensive Income (Loss) $ (337,688) $ (337,688)  
Adjustment of Redeemable Capital Shares to Redemption Value related to Retained Earnings 337,688 337,688 $ (337,688)
Adjustment of Redeemable Capital Shares to Redemption Value     (15,179,005)
Balance at Mar. 31, 2021     $ 187,708,098
Balance, Shares at Mar. 31, 2021     2,200,000
Balance at Dec. 31, 2021 $ 171,153,887   $ 171,153,887
Balance, Shares at Dec. 31, 2021 2,100,000   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   $ 177,585,507
Balance, Shares at Mar. 31, 2022 2,300,000   2,300,000