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Statements of Cash Flows (Unaudited)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Cash flows from operating activities          
Net Comprehensive Income (Loss) $ (761,609) $ (529,829) $ (1,509,159) $ (1,142,215)  
Adjustments to reconcile net comprehensive income (loss) to net cash provided by (used in) operating activities:          
Accrued Sponsor’s fee     (14,877) (25,376)  
Accrued interest expense     16,690 (31,931)  
Net cash provided by (used in) operating activities     (1,507,346) (1,199,522)  
Cash flows from financing activities          
Proceeds from purchases of redeemable capital Shares     113,462,451 124,290,283  
Redemptions of redeemable capital Shares     (135,478,655) (198,102,363)  
Net cash provided by (used in) financing activities     (22,016,204) (73,812,080)  
Effect of exchange rate on cash     (10,263,398) (301,740)  
Net change in cash     (33,786,948) (75,313,342)  
Cash at beginning of period     327,764,221 271,521,028 $ 271,521,028
Cash at end of period $ 293,977,273 $ 196,207,686 293,977,273 196,207,686 $ 327,764,221
Supplemental disclosure of cash flow information          
Cash paid for interest     $ 875,736 $ 671,438