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Equity Incentive Awards (Tables)
3 Months Ended
Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Options Activity The following table summarizes the Company’s option activity and related information:
Number of
Options
(in thousands)
Weighted-
Average
Exercise Price
Balance at December 31, 202219,320 $5.79 
Options granted4,216 0.74 
Options exercised— — 
Options forfeited(229)6.16 
Balance at March 31, 202323,307 $4.87 
Exercisable as of March 31, 20237,812 $9.43 
Schedule of Restricted Stock Units Activity The following table summarizes the Company’s RSUs activity and related information:
Number of Units
(in thousands)
Weighted-
Average Grant-
Date Fair Value
Outstanding at December 31, 20221,693 $2.90 
Granted529 0.75 
Vested and released(456)3.25 
Forfeited(28)4.17 
Outstanding at March 31, 20231,738 $2.14 
Schedule of Stock-Based Compensation Expense The following table presents, by operating expense, the Company’s stock-based compensation expense:
Three Months Ended
March 31,
20232022
(In thousands)
Research and development$1,381 $1,933 
General and administrative3,182 3,448 
Total stock-based compensation expense$4,563 $5,381