Quarterly report [Sections 13 or 15(d)]

Stock-Based Compensation - Summary of Stock Options Activity (Details)

v3.26.3
Stock-Based Compensation - Summary of Stock Options Activity (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
$ / shares
shares
Number of Shares    
Outstanding, beginning balance (in shares) | shares 39,943  
Granted (in shares) | shares 14,450  
Exercised (in shares) | shares 0  
Cancelled (in shares) | shares (990)  
Outstanding, ending balance (in shares) | shares 53,403 39,943
Number of shares, Exercisable (in shares) | shares 32,925  
Number of shares, Vested or expected to vest (in shares) | shares 53,403  
Weighted Average Exercise Price    
Outstanding beginning balance (in dollars per share) | $ / shares $ 0.09  
Granted (in dollars per share) | $ / shares 0.04  
Exercised (in dollars per share) | $ / shares 0  
Cancelled (in dollars per share) | $ / shares 0.11  
Outstanding ending balance (in dollars per share) | $ / shares 0.08 $ 0.09
Weighted average exercise price, Exercisable (in dollars per share) | $ / shares 0.1  
Weighted average exercise price, Vested or expected to vest (in dollars per share) | $ / shares $ 0.08  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]    
Outstanding balance, weighted average remaining contract term (in years) 7 years 10 months 24 days 8 years 1 month 6 days
Options exercisable, weighted average remaining contract term (in years) 7 years 3 months 18 days  
Options Vested or expected to vest, weighted average remaining contract term (in years) 7 years 10 months 24 days  
Outstanding, aggregate intrinsic value | $ $ 0 $ 555
Options exercisable, aggregate intrinsic value | $ 0  
Options Vested or expected to vest, aggregate intrinsic value | $ $ 0