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Note 8 - Warrants - Schedule of Warrant Activity (Details) - $ / shares
 1 Months Ended 3 Months Ended 12 Months Ended
May 31, 2025
Mar. 31, 2025
Mar. 31, 2026
Dec. 31, 2025
Warrants, Including Series B and F [Member]        
Outstanding (in shares)     4,764,386  
Outstanding, weighted average exercise price (in dollars per share)     $ 1.09  
Outstanding, remaining contractual term (Year)     2 years 6 months 25 days 2 years 8 months 8 days
Outstanding (in shares)     3,550,980 4,764,386
Outstanding, weighted average exercise price (in dollars per share)     $ 1.0313 [1] $ 1.09
Exercisable (in shares)     3,550,980  
Exercisable, weighted average exercise price (in dollars per share) [1]     $ 1.0313  
Exercisable, remaining contractual term (Year)     2 years 6 months 25 days  
Series A and B Warrants [Member]        
Outstanding (in shares)     60,983  
Outstanding, weighted average exercise price (in dollars per share)     $ 1.94  
Outstanding, remaining contractual term (Year)     3 years 6 months 3 years 9 months
Issued (in shares) 3,057,622 2,582,234    
Outstanding (in shares)     60,983 60,983
Outstanding, weighted average exercise price (in dollars per share) $ 0.8294 $ 1.2 $ 1.94 [1] $ 1.94
Exercisable (in shares)     60,983  
Exercisable, weighted average exercise price (in dollars per share)     $ 1.94  
Exercisable, remaining contractual term (Year)     3 years 6 months  
January 2, 2026 Warrants [Member]        
Issued (in shares)     586,441  
Issued, weighted average exercise price (in dollars per share)     $ 0.8526  
Series F Warrants [Member]        
Exercised (in shares)     (1,799,847)  
Exercised, weighted average exercise price (in dollars per share)     $ 0.8526  
Outstanding, weighted average exercise price (in dollars per share)     $ 0.8526  
[1] Reflects the exercise price after the January 2026 Down Round Trigger.