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Stockholders' Equity - Activity under Plans (Detail) - 2020 Equity Incentive Plan [Member] - $ / shares | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Number of Shares, Outstanding, beginning of period | 427,710 |
Number of Shares, Forfeited | (60,366) |
Number of Shares, Expired | (7,590) |
Number of Shares, Outstanding, end of period | 359,754 | 427,710
Number of Shares, Vested and expected to vest | 359,534 | 427,351
Number of Shares, Options exercisable | 359,754 | 427,490
Number of Shares, Outstanding, Weighted Average Exercise Price, beginning of period | $ 103.49 |
Number of Shares, Forfeited, Weighted Average Exercise Price | 91.13 |
Number of Shares, Expired, Weighted Average Exercise Price | 44.2 |
Number of Shares, Outstanding, Weighted Average Exercise Price, end of period | 106.81 | $ 103.49
Number of Shares,Vested and expected to vest, Weighted Average Exercise Price, end of period | 106.81 | 103.48
Number of Shares, Options exercisable, Weighted Average Exercise Price, end of period | $ 106.81 | $ 103.49
Number of Shares, Outstanding, Weighted Average Remaining Contractual Term (years) | 3 years 1 month 6 days | 3 years 8 months 12 days
Number of Shares, Vested and expected to vest, Weighted Average Remaining Contractual Term (years) | 3 years 1 month 6 days | 3 years 8 months 12 days
Number of Shares, Options exercisable, Weighted Average Remaining Contractual Term (years) | 3 years 1 month 6 days | 3 years 8 months 12 days

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- Definition Line items represent financial concepts included in a table. 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