v3.26.1
Stock-based Compensation - Summary of Stock Option Activity (Detail) - Amended and Restated 2014 Stock Incentive Plan - Stock Options
 12 Months Ended
Dec. 31, 2025
USD ($)
$ / shares
shares
Number of Shares  
Outstanding beginning balance (in shares) | shares 883,334
Granted (in shares) | shares 583,890
Exercised (in shares) | shares 0
Forfeited (in shares) | shares (765)
Expired (in shares) | shares (57,417)
Outstanding ending balance (in shares) | shares 1,409,042
Options exercisable, ending (in shares) | shares 870,141
Options vested and expected to vest, ending (in shares) | shares 870,141
Weighted- Average Exercise Price  
Outstanding beginning balance (in usd per share) | $ / shares $ 14.58
Granted (in usd per share) | $ / shares 2.72
Exercised (in usd per share) | $ / shares 0
Forfeited (in usd per share) | $ / shares 3.18
Expired (in usd per share) | $ / shares 20.90
Outstanding ending balance (in usd per share) | $ / shares 9.41
Options exercisable, ending (in usd per share) | $ / shares 12.57
Options vested and expected to vest, ending (in usd per share) | $ / shares $ 12.57
Weighted- Average Remaining Contractual Life (Years)  
Outstanding, ending 7 years 6 months 3 days
Option exercisable, ending 6 years 7 months 20 days
Options vested and expected to vest, ending 6 years 7 months 20 days
Aggregate Intrinsic Value *  
Outstanding, ending | $ $ 0
Options exercisable, ending | $ 0
Options vested and expected to vest, ending | $ $ 0