v3.26.1
Stock-Based Compensation - Schedule of Stock Option Activity (Details) - 2018 Plan - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Number of Options    
Beginning balance (in shares) 31,138,077  
Options granted (in shares) 6,995,020  
Options exercised (in shares) (2,438)  
Options forfeited (in shares) (214,612)  
Ending balance (in shares) 37,916,047 31,138,077
Number of options, exercisable (in shares) 22,823,105  
Number of options, vested and expected to vest (in shares) 37,916,047  
Weighted- Average Exercise Price    
Beginning balance (in dollars per share) $ 6.31  
Options granted (in dollars per share) 1.87  
Options exercised (in dollars per share) 1.94  
Options forfeited (in dollars per share) 4.81  
Ending balance (in dollars per share) 5.50 $ 6.31
Weighted-average exercise price, exercisable (in dollars per share) 7.81  
Weighted-average exercise price, vested and expected to vest (in dollars per share) $ 5.50  
Weighted-average remaining contract term, outstanding (in years) 7 years 5 months 23 days 7 years 2 months 1 day
Weighted-average remaining contract term, exercisable (in years) 6 years 3 months 25 days  
Weighted-average remaining contract term, vested and expected to vest (in years) 7 years 5 months 23 days  
Aggregate intrinsic value, beginning balance $ 97  
Aggregate intrinsic value, ending balance 9,302 $ 97
Aggregate intrinsic value, exercisable 1,282  
Aggregate intrinsic value, vested and expected to vest $ 9,302