v3.25.4
Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2025
Stock-Based Compensation [Abstract]  
Summary of Stock-Based Compensation Expense The following table summarizes the stock-based compensation expense that was recognized in the consolidated statements of operations for the years ended December 31, 2025, and 2024.
         
(in thousands)
  2025     2024  
Selling, general and administrative
$130  $464 
Research and development
 (3  14 
Total
 $127  $478 
Summary of Plan Stock Option Activity The following is a summary of the Plans’ stock option activity during the years ended December 31:
                     
 
2025  

2024  
    Options
Outstanding
    Weighted
Average Exercise
Price
    Options
Outstanding
    Weighted
Average
Exercise
Price
 
Beginning Balance
  78   $12,826.50    55   $18,580.00 
Granted
  4,409    21.37    28    1,014.30 
Exercised
               
Forfeited/expired
  (39   41,512.05    (4   366,122.31 
Outstanding at December 31
  4,452   $51.11    78   $12,826.50 
Vested at December 31
  2,381   $68.53    46   $4,189.18 
 
                     
 
2025  

2024  
    Options
Outstanding
  Weighted
Average
Fair
Value
    Options
Outstanding
    Weighted
Average
Fair
Value
 
Beginning Balance
  78   $11,834.31    55   $17,178.94 
Granted
  4,409    19.23    28    920.22 
Exercised
               
Forfeited/expired
  (39   47,018.11    (4   9,163.04 
Outstanding at December 31
  4,452   $47.15    78   $11,834.31 
Vested at December 31
  2,381   $63.28    46   $3,965.77 
Weighted Average Assumptions used in Black-Scholes Option Pricing Model
The following table provides the weighted average assumptions used in the Black-Scholes option pricing model for the years ended December 31:
 
         
    2025     2024  
Expected dividend yield
  0%   0%
Risk-free interest rate
  3.90%   3.94%
Expected volatility
  137.35%   138.70%
Expected life (in years)
  5.50    5.51