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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

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