XML 35 R21.htm IDEA: XBRL DOCUMENT v3.5.0.2
Redeemable Capital Shares - Schedule for Redeemable Capital Shares Activity (Detail) - USD ($)
 9 Months Ended 12 Months Ended
Jul. 31, 2016
Oct. 31, 2015
Temporary Equity Disclosure [Abstract]    
Opening Balance, Shares 2,850,000 2,850,000
Shares issued, Shares 250,000 1,600,000
Shares redeemed, Shares (350,000) (1,600,000)
Ending Balance, Shares 2,750,000 2,850,000
Opening Balance, Amount $ 216,269,477 $ 251,414,970
Shares issued, Amount 18,604,755 127,858,942
Shares redeemed, Amount (26,036,050) (127,864,231)
Adjustment to period shares due to currency movement and other, Amount (73,141) (35,140,204)
Ending Balance, Amount $ 208,765,041 $ 216,269,477