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Share-Based Expense
 3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Share-Based Expense

 

7. Share-Based Expense

 

Total share-based expense related to stock options and restricted stock units (“RSUs”) was approximately $0.1 million during each of the three months ended March 31, 2024 and 2023.

  

Share-based expense is classified in the condensed consolidated statements of operations as follows: 

Schedule of Share-Based Compensation Expense        
   Three Months Ended March 31, 
   2024   2023 
Research and development expenses  $15,237   $13,688 
General and administrative expenses   61,837    55,164 
   $77,074   $68,852 

 

Employee Stock Options

 

No stock option awards to purchase shares of common stock were granted during the three months ended March 31, 2024 and 2023. The Company recognized a total of approximately $0.1 million of share-based expense related to employee stock options during each of the three months ended March 31, 2024 and 2023. No employee stock options or RSUs were exercised and none expired during the three months ended March 31, 2024 and 2023.

 

Non-Employee Stock Options

 

There were no non-employee stock options granted or exercised during the three months ended March 31, 2024 and 2023. No non-employee stock option grants expired during the three months ended March 31, 2024. During the three months ended March 31, 2023, non-employee stock option grants to purchase approximately 100 shares of common stock expired. The Company did not recognize any share-based expense related to non-employee stock options during the three months ended March 31, 2024 and 2023.