Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Accounting Policy [Line Items]
Transfers of assets between Level 1 and Level 2	$ 0	$ 0
Transfers of liabilities between Level 1 and Level 2	0	0
Provision for income tax	0
Fair value of T-Bills		(15,575)
US Treasury Bills
Accounting Policy [Line Items]
Fair value of T-Bills	$ 0	$ 0
Latest Tax Year [Member]
Accounting Policy [Line Items]
Tax years remain subject to examination	2021
Earliest Tax Year [Member]
Accounting Policy [Line Items]
Tax years remain subject to examination	2017

Accounting policy.

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Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

+ References

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Amount of transfers of liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

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Tax year being audited in the income tax examination, in YYYY format.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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