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Statements of Cash Flows
2 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CAD ($)
Dec. 31, 2017
USD ($)
Oct. 31, 2018
USD ($)
Jul. 31, 2018
USD ($)
Apr. 30, 2018
USD ($)
Jan. 31, 2018
USD ($)
Oct. 31, 2017
USD ($)
Jul. 31, 2017
USD ($)
Apr. 30, 2017
USD ($)
Jan. 31, 2017
USD ($)
Oct. 31, 2018
USD ($)
Oct. 31, 2018
CAD ($)
Oct. 31, 2017
USD ($)
Oct. 31, 2017
CAD ($)
Cash flows from operating activities                              
Cash received for accrued income $ 301,234   $ 132,855                 $ 1,134,672   $ 226,241  
Cash paid for Sponsor's fee (103,771)   (118,226)                 (669,222) $ (4,301) (764,437) $ (726,489)
Net cash provided by/(used in) operating activities 197,463   14,629                 465,450   (538,196)  
Cash flows from financing activities                              
Cash received to purchase redeemable Shares 14,787,034 $ 39,458,295 0                 42,164,974 54,255,052 37,735,347 49,380,475
Cash paid to redeem redeemable Shares (18,556,077) $ (24,661,434) (11,595,613)                 (57,493,667) $ (73,984,431) (64,137,640) $ (83,929,646)
Cash paid for distributions (197,264)   (14,539)                 (470,368)   (16,305)  
Net cash used in financing activities (3,966,307)   (11,610,152)                 (15,799,061)   (26,418,598)  
Adjustment to period cash flows due to currency movement (5,910,619)   4,863,874                 (2,930,169)   7,353,782  
Decrease in cash (9,679,463)   (6,731,649)                 (18,263,780)   (19,603,012)  
Cash at beginning of period 157,742,523   176,006,303       $ 176,006,303       $ 195,609,315 176,006,303   195,609,315  
Cash at end of period 148,063,060   169,274,654 $ 157,742,523       $ 176,006,303       157,742,523   176,006,303  
Reconciliation of net comprehensive income/(loss) to net cash provided by/(used in) operating activities                              
Net Comprehensive Income/(Loss) 178,060   9,830 $ 239,400 $ 176,980 $ 91,650 $ 44,903 $ 13,265 $ (142,342) $ (148,397) $ (184,495) 552,933   (461,969)  
Adjustments to reconcile net comprehensive income/(loss) to net cash provided by/(used in) operating activities:                              
Receivable from accrued interest (118,933)   (55,715)                 (144,394)   (61,585)  
Prior period receivable from accrued interest 144,394   61,585                 61,585      
Effect of exchange rate on cash (3,009)   (46)                 1,893   (9,520)  
Accrued Sponsor's fee 50,556   59,147                 53,605   60,172  
Prior period accrued Sponsor's fee (53,605)   (60,172)                 (60,172)   (65,294)  
Net cash provided by/(used in) operating activities $ 197,463   $ 14,629                 $ 465,450   $ (538,196)