v3.26.1
Note 8 - Stockholders' Equity (Details Textual)
 12 Months Ended
Apr. 30, 2026
USD ($)
$ / shares
shares
Apr. 30, 2025
USD ($)
Feb. 26, 2026
$ / shares
shares
Stock Issued During Period, Shares, New Issues (in shares) 96,636,370    
Proceeds from Warrant Exercises | $ $ 50,000 $ 0  
Proceeds from Issuance of Common Stock and Warrants | $ $ 2,984,000 0  
Units, Common Stock per Unit (in shares) 1   1
Units, Warrants per Unit (in shares) 1    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) 1,416,667    
Proceeds from Stock Options Exercised | $ $ 85,000 $ 0  
Stock Issued During Period, Shares, Issued for Services (in shares) 1,333,438    
Stock Issued During Period, Value, Issued for Services | $ $ 76,541    
Conversion of Convertible Debt Into Common Stock [Member]      
Debt Conversion, Converted Instrument, Shares Issued (in shares) 16,786,265    
Debt Conversion, Original Debt, Amount | $ $ 671,450    
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares $ 0.04    
Private Placement [Member]      
Stock Issued During Period, Shares, New Issues (in shares) 74,600,000    
Units, Issued, Shares (in shares) 74,600,000    
Units, Price per Unit 0.04    
Proceeds from Issuance of Common Stock and Warrants | $ $ 2,984,000    
Warrants Issued for Equity Investment [Member]      
Stock Issued During Period, Shares, Issued for Exercise of Warrants (in shares) 2,500,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 0.02    
Proceeds from Warrant Exercises | $ $ 50,000    
Unit Warrants [Member]      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares     $ 0.08
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) 0.5   0.5
Units, Warrants per Unit (in shares)     1