Investments in Affiliates - Additional Information (Detail) - USD ($)		3 Months Ended
		Mar. 31, 2022	Dec. 31, 2021
Investments In And Advances To Affiliates [Line Items]
Treasury obligation measurement maximum maturity period		12 months
United States Treasury Obligations, at value		$ 159,768,577	$ 92,006,259
United States Treasury Obligations [Member]
Investments In And Advances To Affiliates [Line Items]
United States Treasury Obligations, at value	[1]	$ 159,768,577	$ 92,006,259
Affiliated Investments [Member] | United States Treasury Obligations [Member]
Investments In And Advances To Affiliates [Line Items]
Treasury obligation measurement minimum maturity period		1 month
Treasury obligation measurement maximum maturity period		12 months
Affiliated Investments [Member] | Money Market Mutual Fund - Invesco Government & Agency Portfolio, Institutional Class [Member] | Minimum [Member]
Investments In And Advances To Affiliates [Line Items]
United States Treasury Obligations, at value		$ 300,000,000

[1] Security may be traded on a discount basis. The interest rate shown represents the discount rate at the most recent auction date of the security prior to period end.