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v3.22.2.2

Investments - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2022 | Dec. 31, 2021
Schedule Of Investments [Line Items] |  |  |
Short-term investments | $ 110,738,000 | $ 110,738,000 | $ 79,932,000
Long-term investments | 12,728,000 | 12,728,000 | 56,619,000
Interest on investments | 700,000 | 1,600,000 |
Amortization on investments | 200,000 | 600,000 |
Allowance for credit losses | 0 | 0 |
Unrealized holding loss |  | 1,200,000 |
Prepaid Expenses and Other Current Assets |  |  |
Schedule Of Investments [Line Items] |  |  |
Investment securities | 600,000 | 600,000 | 300,000
Convertible Promissory Note | Thirona Bio, Inc. |  |  |
Schedule Of Investments [Line Items] |  |  |
Investment securities | $ 6,800,000 | $ 6,800,000 | $ 3,000,000.0

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