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v3.23.3

Short-term investments - Summary of Short-term Investments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items] |  |  |  |  |
Cost | $ 125,089 |  | $ 125,089 |  | $ 170,464
Gross Unrealized Losses | (361) | $ (596) | (1,167) | $ (3,026) |
Fair Value | 124,581 |  | 124,581 |  | 168,789
Short-Term Investments [Member] |  |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |  |
Gross Unrealized Gains |  |  | 470 |  | 140
Gross Unrealized Losses |  |  | (978) |  | (1,815)
Corporate Debt Securities [Member] |  |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |  |
Cost | 90,860 |  | 90,860 |  | 151,245
Fair Value | 90,180 |  | 90,180 |  | 149,576
Corporate Debt Securities [Member] | Short-Term Investments [Member] |  |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |  |
Gross Unrealized Gains |  |  | 257 |  | 100
Gross Unrealized Losses |  |  | (937) |  | (1,769)
Asset-Backed Securities [Member] |  |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |  |
Cost | 1,276 |  | 1,276 |  | 16,269
Fair Value | 1,281 |  | 1,281 |  | 16,254
Asset-Backed Securities [Member] | Short-Term Investments [Member] |  |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |  |
Gross Unrealized Gains |  |  | 9 |  | 31
Gross Unrealized Losses |  |  | (4) |  | (46)
Government securities [Member] |  |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |  |
Cost | 32,953 |  | 32,953 |  | 2,950
Fair Value | $ 33,120 |  | 33,120 |  | 2,959
Government securities [Member] | Short-Term Investments [Member] |  |  |  |  |
Debt Securities, Available-for-Sale [Line Items] |  |  |  |  |
Gross Unrealized Gains |  |  | 204 |  | 9
Gross Unrealized Losses |  |  | $ (37) |  | $ 0

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