Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Tables)

v3.23.2
Stock-based Compensation (Tables)
6 Months Ended
Jun. 30, 2023
Stock-based Compensation [Abstract]  
Stock-Based Compensation Expense
Stock-based compensation expense was included in general and administrative and research and development costs as follows in the accompanying condensed statements of comprehensive loss for the three and six-month periods indicated below (in thousands):
 
 
 
Three Months
Ended
June 30,
   
Six Months
Ended
June 30,
 
 
 
2023
   
2022
   
2023
   
2022
 
General and administrative
  $ 1,166    
$
276
   
$
1,634
   
$
571
 
Research and development
   
256
     
169
     
592
     
319
 
Total stock-based compensation
 
$
1,422
   
$
445
   
$
2,226
   
$
890
 
Weighted Average Assumptions Used in Black-Scholes Option-pricing Model
The weighted average assumptions used in the Black-Scholes option pricing model are as follows during the three and six months ended June 30, 2023 and 2022:

 
 
Three Months
Ended
June 30,
   
Six Months
Ended
  June 30,
 
 
 
2023
   
2022
   
2023
   
2022
 
Expected stock price volatility
   
94.4
%
   
96.2
%
   
95.3
%
   
98.8
%
Expected life of options (years)
   
5.8
     
5.7
     
6.1
     
5.9
 
Expected dividend yield
   
0
%
   
0
%
   
0
%
   
0
%
Risk free interest rate
   
3.7
%
   
3.3
%
   
3.7
%
   
2.1
%