Investments - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($) Note	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Schedule Of Investments [Line Items]
Interest on available for sale investment	$ 500,000	$ 500,000
Accretion or amortization	1,600,000	700,000
Allowance for credit losses	$ 0	0
Accrued interest receivable		600,000
Amount receivable on matured investment		5,100,000
Convertible Promissory Note | Thirona Bio, Inc.
Schedule Of Investments [Line Items]
Number of notes | Note	2
Amount Due	$ 8,000,000
Stated interest rate	6.00%
Investment securities	$ 6,900,000	7,100,000
Available-for-Sale Investment, credit losses	200,000	900,000
Unrealized holding gain or loss	0	$ 0	$ 0
Prepaid Expenses and Other Current Assets
Schedule Of Investments [Line Items]
Accrued interest receivable	$ 500,000