v3.26.1
Note 15 - Stock-based Compensation - Schedule of Stock Option Activity (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Share-Based Payment Arrangement, Option [Member]    
Options, Outstanding (in shares) 123,678  
Options, outstanding, weighted average exercise price (in dollars per share) $ 8.07  
Options, outstanding, weighted average remaining life (Year) 9 years 4 months 17 days 9 years 3 months 14 days
Options, outstanding, aggregate intrinsic value $ 0 $ 0
Options exercised (in shares) 0  
Options exercised, weighted average exercise price (in dollars per share) $ 0  
Options granted (in shares) 200,000  
Options granted, weighted average exercise price (in dollars per share) $ 1.15  
Cancelled/forfeited (in shares) (15,995)  
Cancelled/forfeited, weighted average exercise price (in dollars per share) $ 9.25  
Options, outstanding (in shares) 307,683 123,678
Options, outstanding, weighted average exercise price (in dollars per share) $ 3.51 $ 8.07
Options, outstanding, vested and expected to vest (in shares) 307,683  
Options, outstanding, vested and expected to vest, weighted average exercise price (in dollars per share) $ 3.51  
Options, outstanding, vested and expected to vest, weighted average remaining life (Year) 9 years 4 months 17 days  
Options, outstanding, vested and expected to vest, aggregate intrinsic value $ 0  
Options, exercisable, vested and expected to vest (in shares) 27,945  
Options, exercisable, vested and expected to vest, weighted average exercise price (in dollars per share) $ 13.13  
Options, exercisable, vested and expected to vest, weighted average remaining life (Year) 8 years 21 days  
Options, exercisable, vested and expected to vest, aggregate intrinsic value $ 0  
Non-plan Options [Member]    
Options, Outstanding (in shares) 26,315  
Options, outstanding, weighted average exercise price (in dollars per share) $ 10.07  
Options, outstanding, weighted average remaining life (Year) 9 years 7 months 6 days 9 years 7 days
Options, outstanding, aggregate intrinsic value $ 0 $ 0
Options exercised (in shares) 0  
Options exercised, weighted average exercise price (in dollars per share) $ 0  
Options granted (in shares) 175,000  
Options granted, weighted average exercise price (in dollars per share) $ 1.15  
Cancelled/forfeited (in shares) 0  
Cancelled/forfeited, weighted average exercise price (in dollars per share) $ 0  
Options, outstanding (in shares) 201,315 26,315
Options, outstanding, weighted average exercise price (in dollars per share) $ 2.32 $ 10.07
Options, outstanding, vested and expected to vest (in shares) 201,315  
Options, outstanding, vested and expected to vest, weighted average exercise price (in dollars per share) $ 2.32  
Options, outstanding, vested and expected to vest, aggregate intrinsic value $ 0  
Options, exercisable, vested and expected to vest (in shares) 187,426  
Options, exercisable, vested and expected to vest, weighted average exercise price (in dollars per share) $ 1.74  
Options, exercisable, vested and expected to vest, weighted average remaining life (Year) 9 years 7 months 6 days  
Options, exercisable, vested and expected to vest, aggregate intrinsic value $ 0  
Options, Exercisable, weighted average remaining life (Year) 9 years 8 months 4 days