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Canadian Dollar Deposits - Additional Information (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Jun. 30, 2022
CAD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2021
CAD ($)
Jun. 30, 2022
CAD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
CAD ($)
Cash And Cash Equivalents [Abstract]              
Principal deposits $ 19,151,146 $ 24,474,357 $ 130,131,963 $ 250,322,349      
Principal redemptions 57,727,353 73,376,462 $ 75,016,335 264,885,208      
Withdrawals during period   $ 355,770   $ 886,988      
Deposits, interest bearing $ 98,563,116       $ 127,141,491 $ 139,650,371 $ 176,399,366
Annual nominal rate 0.00%       0.00%