Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Tables)

v3.23.3
Stock-based Compensation (Tables)
9 Months Ended
Sep. 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 income (loss) for the three and nine-month periods indicated below (in thousands):
 
 
 
Three Months
Ended
September 30,
   
Nine Months
Ended
September 30,
 
 
 
2023
   
2022
   
2023
   
2022
 
General and administrative
  $ 335    
$
299
   
$
1,969
   
$
870
 
Research and development
   
238
     
194
     
830
     
513
 
Total stock-based compensation
 
$
573
   
$
493
   
$
2,799
   
$
1,383
 
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 nine months ended September 30, 2023 and 2022:

 
 
Three Months
Ended
September 30,
   
Nine Months
Ended
  September 30,
 
 
 
2023
   
2022
   
2023
   
2022
 
Expected stock price volatility
   
96.4
%
   
91.2
%
   
95.3
%
   
97.4
%
Expected life of options (years)
   
6.1
     
5.4
     
6.1
     
5.8
 
Expected dividend yield
   
0
%
   
0
%
   
0
%
   
0
%
Risk free interest rate
   
4.2
%
   
3.4
%
   
3.7
%
   
2.3
%