v3.25.2
Convertible Preferred Stock and Stockholders' Deficit - Summary of Stock Option Activity (Detail) - 2006 Plan and 2010 Plan [Member]
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2025
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Outstanding Options, Outstanding, Beginning balance | shares 12,522,943
Number of Outstanding Options, Granted | shares 1,125,572
Number of Outstanding Options, Expired | shares (734)
Number of Outstanding Options, Outstanding, Ending balance | shares 13,647,781
Number of Outstanding Options, Vested and expected to vest at June 30, 2025 | shares 13,492,670
Number of Outstanding Options, Exercisable at June 30, 2025 | shares 10,841,653
Weighted Average Exercise, Outstanding, Beginning balance | $ / shares $ 0.58
Weighted Average Exercise, Granted | $ / shares 0.13
Weighted Average Exercise Price, Expired | $ / shares 9.3
Weighted Average Exercise, Outstanding, Ending balance | $ / shares 0.54
Weighted Average Exercise, Vested and expected to vest at June 30, 2025 | $ / shares 0.54
Weighted Average Exercise, Exercisable at June 30, 2025 | $ / shares $ 0.65
Weighted Average Remaining Contractual Term (in years), Options Outstanding Ending Balance 6 years 8 months 23 days
Weighted Average Remaining Contractual Term (in years), Vested and expected to vest at June 30, 2025 6 years 8 months 15 days
Weighted Average Remaining Contractual Term (in years), Exercisable at June 30, 2025 6 years 1 month 28 days
Aggregate Intrinsic Value, Outstanding at June 30, 2025 | $ $ 193
Aggregate Intrinsic Value, Vested and expected to vest at June 30, 2025 | $ 188
Aggregate Intrinsic Value, Exercisable at June 30, 2025 | $ $ 111