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Equity Incentive Plans - Summary of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Equity Incentive Plan [Line Items] |  |  |  |
Cumulative stock-based compensation | $ 5,080 | $ 6,388 | $ 11,553 | $ 24,411
Cost of Revenue |  |  |  |
Equity Incentive Plan [Line Items] |  |  |  |
Cumulative stock-based compensation | 135 | 296 | 438 | 1,092
Research and Development |  |  |  |
Equity Incentive Plan [Line Items] |  |  |  |
Cumulative stock-based compensation | 1,117 | 1,400 | 2,426 | 6,025
Sales and Marketing |  |  |  |
Equity Incentive Plan [Line Items] |  |  |  |
Cumulative stock-based compensation | 1,174 | 945 | 2,586 | 4,898
General and Administrative |  |  |  |
Equity Incentive Plan [Line Items] |  |  |  |
Cumulative stock-based compensation | $ 2,654 | $ 3,747 | $ 6,103 | $ 12,396

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