Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Tables)

v3.22.2.2
Stock-based Compensation (Tables)
9 Months Ended
Sep. 30, 2022
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 consolidated statements of comprehensive loss for the three and nine month periods indicated below (in thousands):
 
 
 
Three Months
Ended
September 30,
   
Nine Months
Ended
September 30,
 
 
 
2022
   
2021
   
2022
   
2021
 
General and administrative
 
$
299
   
$
322
   
$
870
   
$
804
 
Research and development
   
194
     
156
     
513
     
631
 
Total stock-based compensation
 
$
493
   
$
478
   
$
1,383
   
$
1,435
 
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, 2022 and 2021:

 
 
Three Months
Ended
September 30,
   
Nine Months
Ended
  September 30,
 
 
 
2022
   
2021
   
2022
   
2021
 
Expected stock price volatility
   
91.2
%
   
99.7
%
   
97.4
%
   
98.0
%
Expected life of options (years)
   
5.4
     
5.8
     
5.8
     
5.8
 
Expected dividend yield
   
0
%
   
0
%
   
0
%
   
0
%
Risk free interest rate
   
3.4
%
   
0.9
%
   
2.3
%
   
0.9
%