v3.26.1
Note 9 - Stock-based Compensation - Schedule of Stock Options (Details) - $ / shares
shares in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Outstanding, shares (in shares) 6,082  
Outstanding, weighted average exercise price (in dollars per share) $ 29.8  
Outstanding, weighted average remaining contractual term (Year) 8 years 4 months 24 days 8 years 4 months 24 days
Granted, shares (in shares) 2,500  
Granted, weighted average exercise price (in dollars per share) $ 3.45  
Expired, shares (in shares) (237)  
Expired, weighted average exercise price (in dollars per share) $ 115.5  
Outstanding, shares (in shares) 8,345 6,082
Outstanding, weighted average exercise price (in dollars per share) $ 19.5 $ 29.8
Vested and expected to vest, shares (in shares) 8,345  
Vested and expected to vest, weighted average exercise price (in dollars per share) $ 19.5  
Vested and expected to vest, weighted average remaining contractual term (Year) 8 years 4 months 24 days  
Exercisable, shares (in shares) 5,845  
Exercisable, weighted average exercise price (in dollars per share) $ 26.3  
Exercisable, weighted average remaining contractual term (Year) 8 years 4 months 24 days