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Stock-Based Awards - Schedule of Share-based Compensation Activity (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
2021 Equity Incentive Plan [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Number of Options Outstanding, Beginning balance | shares 16,658  
Number of Options Outstanding, Options granted | shares 7,823  
Number of Options Outstanding, Options exercised | shares (181)  
Number of Options Outstanding, Options expired/forfeited/cancelled | shares (324)  
Number of Options Outstanding, Ending balance | shares 23,976 16,658
Number of Options exercisable | shares 10,148  
Number of Options Exercisable and Expected to Vest | shares 23,976  
Number of RSUs Outstanding, Beginning balance | shares 501  
Number of RSUs Outstanding, RSUs forfeited | shares (100)  
Number of RSUs Outstanding, RSUs vested | shares (67)  
Number of RSUs Outstanding, Ending balance | shares 334 501
Weighted Average Exercise Price of Options Outstanding, Beginning balance | $ / shares $ 1.3  
Weighted Average Exercise Price of Options Outstanding, Options granted | $ / shares 0.56  
Weighted Average Exercise Price of Options, Options exercised | $ / shares 1.22  
Weighted Average Exercise Price of Options Outstanding, Options expired/forfeited/cancelled | $ / shares 1.05  
Weighted Average Exercise Price of Options Outstanding, Ending balance | $ / shares 1.06 $ 1.3
Weighted Average Exercise Price of Options exercisable | $ / shares 1.34  
Weighted Average Exercise Price of Options exercisable and expected to vest | $ / shares 1.06  
Weighted Average Grant Date Fair Value Per Share, Beginning balance | $ / shares 1.24  
Weighted Average Grant Date Fair Value Per Share, RSUs forfeited | $ / shares 0.21  
Weighted Average Grant Date Fair Value Per Share, RSUs Vested | $ / shares 1.5  
Weighted Average Grant Date Fair Value Per Share, Ending balance | $ / shares $ 1.5 $ 1.24
Weighted Average Remaining Contractual Team (Years),Options Outstanding 8 years 1 month 6 days 8 years 2 months 23 days
Weighted Average Remaining Contractual Team (Years),Options exercisable 7 years 1 month 28 days  
Weighted Average Remaining Contractual Team (Years), Options exercisable and expected to vest 8 years 1 month 6 days  
Aggregate Intrinsic Value, Options Outstanding | $ $ 15,061 $ 0
Aggregate Intrinsic Value, Options exercisable | $ 3,570  
Aggregate Intrinsic Value, Options exercisable and expected to vest | $ $ 15,061  
2012 Equity Incentive Plan and 2018 Inducement Option [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Number of Options Outstanding, Beginning balance | shares 10,068  
Number of Options Outstanding, Options exercised | shares (441)  
Number of Options Outstanding, Options expired/forfeited/cancelled | shares (1,311)  
Number of Options Outstanding, Ending balance | shares 8,316 10,068
Weighted Average Exercise Price of Options Outstanding, Beginning balance | $ / shares $ 1.84  
Weighted Average Exercise Price of Options, Options exercised | $ / shares 0.97  
Weighted Average Exercise Price of Options Outstanding, Options expired/forfeited/cancelled | $ / shares 2.33  
Weighted Average Exercise Price of Options Outstanding, Ending balance | $ / shares $ 1.81 $ 1.84