XML 151 R30.htm IDEA: XBRL DOCUMENT v3.25.1
Stock-based Compensation (Tables)
12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity
The following table summarizes stock option activity for the year ended December 31, 2024:

 
Number of
Options
Weighted-
Average
Exercise
Price
Weighted-
Average
Remaining
Contractual
Term
(Years)
Aggregate
Intrinsic
Value
Outstanding — January 1, 2024
344,306
$20.92
 
Forfeited or expired
(310,260)
19.87
 
 
Outstanding — December 31, 2024
34,046
30.55
6.69
$35
Exercisable — December 31, 2024
26,142
38.16
6.36
$18
Schedule of Calculation of Fair Value Assumptions
Expected option life (years)
6.0
Risk-free interest rate
3.53%
Expected volatility
104.24%
Expected dividend yield
-%
% 
Schedule of Stock-based Compensation Expenses
The following table presents total stock-based compensation expense for the years ended December 31, 2024 and 2023:

 
Year Ended December 31,
 
2024
2023
Research and development
$149
$243
General and administrative
362
711
Total stock-based compensation expense
$511
$954