v3.24.3
Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Expense
Total compensation cost recognized for all stock-based compensation awards in the condensed consolidated statements of operations was as follows (in thousands):
Three Months Ended
September 30,
Nine Months Ended
September 30,
2024202320242023
Research and development$2,048 $2,571 $7,081 $7,182 
General and administrative2,754 2,160 10,316 7,271 
Total stock-based compensation expense$4,802 $4,731 $17,397 $14,453 
Schedule of Changes in Unvested Restricted Stock
The following is a summary of restricted stock unit awards activity for the nine months ended September 30, 2024:
SharesWeighted Average Grant Date Fair Value Per Share
Unvested restricted stock unit awards as of December 31, 20232,107,147$11.96 
Issued1,480,895$9.28 
Vested(676,466)$12.49 
Forfeited(371,120)$14.58 
Unvested restricted stock unit awards as of September 30, 20242,540,456$9.87 
Schedule of Stock Option Activity
The following is a summary of stock option activity for the nine months ended September 30, 2024:
SharesWeighted Average
Exercise Price
Remaining
Contractual Life (years)
Aggregate Intrinsic
Value
Outstanding at December 31, 20236,149,645$16.47 6.89$3,195 
Granted2,861,411 $8.27 
Exercised(21,975)$8.72 
Cancelled(821,137)$24.86 
Outstanding at September 30, 20248,167,944$14.52 7.74$13 
Exercisable at September 30, 20243,690,879$20.74 6.27$13