v3.26.1
Equity Incentive Plans and Stock-Based Compensation - Schedule of Option Activity Under the 2015 Plan and 2020 Plan (Details) - Incentive Stock Options and Nonqualified Stock Options - 2015 Equity and 2020 Incentive Plan - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Number of Options    
Outstanding, beginning balance (in shares) 7,456,066  
Granted (in shares) 5,117,500  
Exercised (in shares) 0  
Forfeited (in shares) (1,004,547)  
Outstanding, ending balance (in shares) 11,569,019 7,456,066
Number of options, exercisable (in shares) 5,677,190  
Number of options, vested and expected to vest (in shares) 11,569,019  
Weighted- Average Exercise Price per Share    
Outstanding, beginning balance (USD per share) $ 15.28  
Granted (USD per share) 1.29  
Exercised (USD per share) 0  
Forfeited (USD per share) 13.91  
Outstanding, ending balance (USD per share) 9.21 $ 15.28
Weighted- average exercise price per share, exercisable (USD per share) 14.28  
Weighted- average exercise price per share, vested and expected to vest (USD per share) $ 9.21  
Weighted- Average Remaining Contractual Term (in Years)    
Weighted- average remaining contractual term (in years), outstanding 7 years 3 months 3 days 5 years 7 months 6 days
Weighted- average remaining contractual term (in years), exercisable 5 years 5 months 4 days  
Weighted- average remaining contractual term (in years), vested and expected to vest 7 years 3 months 3 days  
Aggregate intrinsic value, outstanding balance $ 0 $ 0
Aggregate intrinsic value, exercisable 0  
Aggregate intrinsic value, vested and expected to vest $ 0