Investments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Schedule Of Investments [Line Items]
Interest on available for sale investment	$ 100,000	$ 100,000	$ 400,000	$ 400,000
Interest on held to maturity investments	1,000,000	700,000	3,200,000	1,600,000
Amortization on investments	500,000	$ 200,000	900,000	600,000
Allowance for credit losses	0		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	400,000		400,000
Accrued interest receivable	300,000		300,000
Amount receivable on matured investment	100,000		100,000
Convertible Promissory Note | Thirona Bio, Inc.
Schedule Of Investments [Line Items]
Investment securities	$ 8,400,000		$ 8,400,000		$ 7,100,000
Gain on available for sale investment				900,000
Unrealized holding gain				$ 400,000