v3.26.1
Equity Incentive Plans - Schedule of Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Shares Subject to Options Outstanding, Shares    
Outstanding as of beginning balance (in shares) 47,436,953  
Options granted (in shares) 63,000,828  
Option exercised (in shares) (211,460)  
Options forfeited/cancelled (in shares) (55,541,870)  
Outstanding as ending balance (in shares) 54,684,451 47,436,953
Options vested and expected to vest as of ending balance (in shares) 54,684,451  
Options exercisable as of ending balance (in shares) 27,944,056  
Shares Subject to Options Outstanding, Weighted Average Exercise Price    
Outstanding as of beginning balance (in dollars per share) $ 1.74  
Options granted (in dollars per share) 0.91  
Option exercised (in dollars per share) 1.04  
Options forfeited/cancelled (in dollars per share) 1.74  
Outstanding as of ending balance (in dollars per share) 0.79 $ 1.74
Options vested and expected to vest as of ending balance (in dollars per share) 0.79  
Options exercisable as of ending balance (in dollars per share) $ 1.06  
Weighted-Average Remaining Contractual Life (in years) 6 years 1 month 6 days 7 years 4 months 24 days
Weighted-Average Remaining Contractual Life (in years), Options vested and expected to vest as of end of period 6 years 1 month 6 days  
Weighted-Average Remaining Contractual Life (in years), Options exercisable as of end of period 5 years  
Aggregate Intrinsic Value $ 0 $ 84,257
Aggregate Intrinsic Value, Options vested and expected to vest as of end of period 0  
Aggregate Intrinsic Value, Options exercisable as of end of period $ 0