Investments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Schedule Of Investments [Line Items]
Interest on investments	$ 1,200,000	$ 400,000
Amortization on investments		$ 300,000
Allowance for credit losses	0
Accrued interest receivable			$ 600,000
Amount receivable on matured investment			5,100,000
Prepaid Expenses and Other Current Assets
Schedule Of Investments [Line Items]
Investment securities	700,000
Accrued interest receivable	600,000
Amount receivable on matured investment	100,000
Convertible Promissory Note | Thirona Bio, Inc.
Schedule Of Investments [Line Items]
Investment securities	$ 7,100,000		$ 7,100,000