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Canadian Dollar Deposits - Additional Information (Detail)	9 Months Ended			12 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2022 CAD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 CAD ($)	Sep. 30, 2022 CAD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 CAD ($)
Cash And Cash Equivalents [Abstract]
Principal deposits	$ 34,161,249	$ 48,907,500	$ 134,071,472	$ 250,322,349
Principal redemptions	65,157,665	83,149,726	$ 136,950,688	264,885,208
Withdrawals during period		$ 444,805		$ 886,988
Deposits, interest bearing	$ 103,134,772				$ 141,712,335	$ 139,650,371	$ 176,399,366
Annual nominal rate	1.00%				1.00%

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Rate of interest on investment.

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Total amount of cash paid for operating activities during the current period.

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