Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v3.24.1.1.u2
Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-based Compensation Expense The amount of stock-based compensation expense recognized for the three months ended March 31, 2024 and 2023 was as follows (in thousands): 
  Three Months Ended March 31,
  2024 2023
Research and development $ 269  $ 326 
General and administrative 360  529 
Total stock-based compensation $ 629  $ 855 
Schedule of Option Activity A summary of option activity for the three months ended March 31, 2024 is as follows:
  Options Outstanding
  Number of shares Weighted average exercise price per share Weighted average grant date fair value per share Weighted average remaining contractual term (in years)
Balance at December 31, 2023 7,211  $ 3,192  $ 1,930  8.3
Granted —  $ —  $ — 
Forfeited (13) $ 660  $ 473 
Expired (3) $ 11,232  $ 6,444 
Balance at March 31, 2024 7,195  $ 3,192  $ 1,936  8.0
Exercisable at March 31, 2024 4,058  $ 4,791  $ 2,803  7.4