Investments - Additional Information (Detail) - U S Treasury Securities Member - Debt [Member]	3 Months Ended
Mar. 31, 2023
Maximum [Member]
Schedule of Investments [Line Items]
US Treasury securities maturity period	1 year
Minimum [Member]
Schedule of Investments [Line Items]
US Treasury securities maturity period	3 months

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration