v3.25.4
Stockholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Expense for Employees and Non-Employees
The following table presents total share-based compensation expense recorded (in thousands):
 Years Ended December 31,
 202520242023
Cost of revenues$503 $1,786 $2,256 
Research and development6,812 28,044 44,103 
Sales and marketing2,174 7,466 9,524 
General and administrative22,375 47,318 77,619 
Total share-based compensation expense$31,864 $84,614 $133,502 
Schedule of Assumptions Used to Determine Fair Value of ESPP
The following table presents the key assumptions used to determine the fair value of the awards:

Expected term (years)2.95
Expected volatility80.62 %
Expected dividends— %
Risk-free interest rate3.57 %
Weighted-average grant-date fair value per share$0.62 
The following table presents the key assumptions used to determine the fair value of rights granted under the ESPP:
 Years Ended December 31,
 202520242023
Expected term (years)0.500.500.50
Expected volatility
105.68% - 122.96%
60.95% - 85.39%
55.79% - 109.39%
Dividend yield0.00 %0.00 %0.00 %
Risk-free interest rate
3.81% - 4.29%
4.44% - 5.40%
5.24% - 5.41%
Weighted-average grant-date fair value per share$0.44 $0.90 $3.62 
Schedule of Restricted And Performance Stock Unit, Activity
RSU and PSU Activity
 Number of RSUs and PSUs OutstandingWeighted Average Grant Date Fair Value
Balance at December 31, 20247,386,965 $10.58 
Granted13,335,528 1.11 
Released(7,931,184)5.47 
Forfeited(2,750,301)12.06 
Balance at December 31, 202510,041,008 $1.56 
Schedule of Stock Option Activity
Stock Option Activity
 
Number of Stock Options Outstanding
Weighted-Average Exercise Price per ShareWeighted-Average Remaining Contractual Term in YearsAggregate Intrinsic Value
Balance at December 31, 2024182,076 $5.74 1.17$— 
Forfeited(123,901)6.09  
Balance at December 31, 202558,175 $5.00 0.42$—