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Stock-Based Compensation, Stock Option Activity (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Stock Options [Member]        
Number of Shares [Roll Forward]        
Options outstanding, beginning balance (in shares)     5,373,063  
Granted options (in shares)     1,246,500  
Exercised (in shares)     0  
Forfeited and expired (in shares)     (222,379)  
Options outstanding, ending balance (in shares) 6,397,184   6,397,184  
Vested and expected to vest (in shares) 6,397,184   6,397,184  
Exercisable (in shares) 3,796,123   3,796,123  
Weighted average exercise price of all outstanding options (in dollars per share) $ 5.88   $ 5.88  
Performance-Based Restricted Stock Units [Member]        
Number of Shares [Roll Forward]        
Granted restricted stock units (in shares) 800,000 0 800,000 0