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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of Share-Based Payment Arrangement, Expensed and Capitalized, Amount The Company recorded stock-based compensation expense in the following expense categories in its accompanying condensed consolidated statements of operations (in thousands):
Three Months Ended
June 30,
Six Months Ended
June 30,
2025202420252024
Research and development$1,575 $1,375 $3,146 $1,940 
General and administrative1,833 939 4,310 1,419 
Total expense$3,408 $2,314 $7,456 $3,359 
Schedule of Share-Based Payment Arrangement, Option, Activity
The following table summarizes the option activity:
OptionsNumber
of
shares
Weighted
average
exercise price
per share
Weighted
average
remaining
contractual
term (in years)
Outstanding at December 31, 20241,387,556$28.62 7.80
Granted832,481$16.77 
Exercised(8,881)$9.47 
Expired/Forfeited(85,658)$35.32 
Outstanding at June 30, 20252,125,498$23.79 8.23
Exercisable at June 30, 2025740,967$24.36 6.41
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions
The fair value of each option was estimated on the grant date using the weighted-average assumptions in the table below:
Three Months Ended
June 30,
Six Months Ended
June 30,
2025202420252024
Expected volatility
94.60%-96.19%
87.43%-90.84%
93.99%-96.49%
86.39%-90.84%
Risk-free interest rate
3.86%-4.05%
4.17%-4.60%
3.86%-4.42%
3.97% - 4.60%
Expected life (in years)
5.27-6.08
5.50-6.15
5.27-6.96
5.50 - 6.15
Expected dividend yield— — — — 
Schedule of Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity
A summary of the Company’s restricted stock unit (“RSU”) activity and related information for the six months ended June 30, 2025 is as follows:
RSUsNumber of SharesWeighted Average Grant Date Fair Value
Unvested at December 31, 2024222,530 $36.06 
Restricted stock units granted135,205 $16.14 
Restricted stock units vested(73,158)$36.06 
Restricted stock units forfeited(12,654)$31.14 
Unvested at June 30, 2025271,923 $26.38 
Schedule of Share-Based Payment Arrangement, Performance Shares, Activity
A summary of the Company’s performance stock unit (“PSU”) activity and related information for the six months ended June 30, 2025 is as follows:
PSUsNumber of SharesWeighted Average Grant Date Fair Value
Unvested at December 31, 2024252,124 $36.06 
Performance stock units granted— $— 
Performance stock units vested— $— 
Performance stock units forfeited— $— 
Unvested at June 30, 2025252,124 $36.06