v3.26.1
Note 5 - Share-Based Compensation - Schedule of Option Activity (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Outstanding (in shares) 4,641,685  
Outstanding, weighted average exercise price (in dollars per share) $ 3.72  
Outstanding, weighted average contractual life (Year) 6 years 6 years 2 months 12 days
Outstanding, aggregate intrinsic value $ 108 $ 200
Outstanding (in shares) 4,641,685 4,641,685
Outstanding, weighted average exercise price (in dollars per share) $ 3.72 $ 3.72
Options exercisable (in shares) 3,633,843  
Options exercisable, weighted average exercise price (in dollars per share) $ 3.63  
Options exercisable, weighted average contractual life (Year) 5 years 10 months 24 days  
Options exercisable, aggregate intrinsic value $ 105  
Options vested or expected to vest (in shares) 4,620,139  
Options vested or expected to vest, weighted average exercise price (in dollars per share) $ 3.71  
Options vested or expected to vest, weighted average contractual life (Year) 6 years  
Options vested or expected to vest, aggregate intrinsic value $ 108