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Statements of Cash Flows (Unaudited)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Cash flows from operating activities          
Net Comprehensive Income (Loss) $ (722,810) $ (475,453) $ (1,865,025) $ (1,435,121)  
Adjustments to reconcile net comprehensive income (loss) to net cash provided by (used in) operating activities:          
Accrued Sponsor’s fee     23,173 (19,584)  
Accrued interest expense     29,711 (16,401)  
Net cash provided by (used in) operating activities     (1,812,141) (1,471,106)  
Cash flows from financing activities          
Proceeds from purchases of redeemable capital Shares     334,139,542 192,248,072  
Redemptions of redeemable capital Shares     (270,204,291) (270,071,178)  
Net cash provided by (used in) financing activities     63,935,251 (77,823,106)  
Effect of exchange rate on cash     8,842,014 (10,877,152)  
Net change in cash     70,965,124 (90,171,364)  
Cash at beginning of period     271,521,028 338,875,956 $ 338,875,956
Cash at end of period $ 342,486,152 $ 248,704,592 342,486,152 248,704,592 $ 271,521,028
Supplemental disclosure of cash flow information          
Cash paid for interest     $ 1,014,473 $ 740,842