Investments - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) Note	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Schedule Of Investments [Line Items]
Interest on held to maturity investments	$ 3,200,000	$ 1,400,000	$ 6,600,000	$ 2,600,000
Net accretion on investments held to maturity	2,000,000	400,000	3,800,000	400,000
Allowance for credit losses	0		0		$ 0
Prepaid Expenses and Other Current Assets
Schedule Of Investments [Line Items]
Accrued interest receivable	$ 800,000		$ 800,000		$ 500,000
Convertible Promissory Note | Thirona Bio, Inc.
Schedule Of Investments [Line Items]
Hypothetical yield percentage	33		33		35
Volatility percentage	75		75		90
Interest on available for sale investment	$ 0	100,000	$ 0	200,000
Number of notes | Note			2
Amount Due	$ 8,000,000		$ 8,000,000
Stated interest rate	10.00%		10.00%
Investment securities	$ 5,300,000		$ 5,300,000		$ 6,900,000
Recognized gain (loss)	$ (1,600,000)	900,000	$ (1,600,000)	900,000
Unrealized holding gain		$ 400,000		$ 400,000