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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity During the Period
The following table summarizes stock option activity for the nine months ended September 30, 2025 (in thousands, except share and per share amounts):
Number of outstanding optionsWeighted
average
exercise
price		Weighted
average
remaining
contractual
term in years		Aggregate intrinsic value
Balance as of December 31, 20242,119,425$7.87 7.98$751 
Granted948,446$3.30 
Forfeited/Cancelled(180,966)$5.44 
Exercises(1,699)$2.12 $2 
Balance as of September 30, 20252,885,206$6.52 7.01$— 
Vested and expected to vest as of September 30, 20252,885,206$6.52 7.05$— 
Exercisable as of September 30, 20251,512,812$7.01 6.51$— 
Schedule of Restricted Stock Award Activity During the Period
A summary of restricted stock award activity for the nine months ended September 30, 2025 is as follows:
Number of sharesWeighted average
fair value
Unvested as of December 31, 202415,943$1.75 
Vested(15,943)$1.75 
Unvested as of September 30, 2025—$— 
Schedule of Stock-Based Compensation Expense
The following table presents the components and classification of stock-based compensation expense for the three and nine months ended September 30, 2025 and 2024 (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Options$984 $1,561 $2,813 $3,143 
Restricted stock awards— 31 34 92 
Total$984 $1,592 $2,847 $3,235 
Research and development$495 $519 $1,459 $1,424 
General and administrative489 1,073 1,388 1,811 
Total$984 $1,592 $2,847 $3,235