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Note 4 - Equity - Schedule of Equity-Based Stock Warrants (Details) - USD ($)
 3 Months Ended 12 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Mar. 31, 2024
Apr. 01, 2024
Outstanding, warrants (in shares) 1,934,874 287,231    
Outstanding, warrants, weighted average exercise price (in dollars per share) $ 5.89 $ 1.64    
Outstanding, warrants, weighted average remaining contractual term (Year)   4 years 1 month 2 days 4 years 9 months 18 days  
Outstanding, warrants, aggregate intrinsic value [1]   $ 532,060   $ 17,072,147
Granted, warrants (in shares) 0 2,542,677    
Granted, warrants, weighted average exercise price (in dollars per share) $ 0 $ 4.31    
Exercised, warrants (in shares) (222,132) (892,432) [2]    
Exercised, warrants, weighted average exercise price (in dollars per share) $ 0.001 $ 0.04 [2]    
Forfeited/Cancelled, warrants (in shares) (130) (2,602)    
Forfeited/Cancelled, warrants, weighted average exercise price (in dollars per share) $ 0.001 $ 0.2    
Expired, warrants (in shares) 0 0    
Expired, warrants, weighted average exercise price (in dollars per share) $ 0 $ 0    
Outstanding, warrants (in shares) 1,712,612 [3] 1,934,874 287,231  
Outstanding, warrants, weighted average exercise price (in dollars per share) $ 6.6498 [3] $ 5.89 $ 1.64  
Exercisable, warrants (in shares) 1,712,612 1,842,889    
Exercisable, warrants, weighted average exercise price (in dollars per share) $ 6.6498 $ 5.67    
Exercisable, warrants, weighted average remaining contractual term ( (Year)   4 years 21 days    
Exercisable, warrants, aggregate intrinsic value [1]   $ 532,060    
[1] Aggregate Intrinsic Value = Excess of market value over the exercise price of all in-the-money stock.
[2] 197,098 exercised shares utilized the “cashless exercise” option and 695,334 exercised shares were paid in cash.
[3] Amount includes 87,531 common warrants; 91,985 Representative's Warrants and 1,533,096 Series A Warrants.