v3.26.3
Condensed Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Jul. 31, 2026
Apr. 30, 2026
Preferred stock, par value (in dollars per share) $ 0.001  
Preferred stock, authorized (in shares) 20,000,000  
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized (in shares) 500,000,000 500,000,000
Common stock, issued (in shares) 3,904,983 3,188,380
Common stock, outstanding (in shares) 3,904,983 3,188,380
Series C Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, authorized (in shares) 20,000,000 20,000,000
Preferred stock, designated (in shares) 600,000 600,000
Preferred stock, issued (in shares) 380,440 380,440
Preferred stock, outstanding (in shares) 380,440 380,440
Series D Preferred Stock [Member]    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, authorized (in shares) 20,000,000 20,000,000
Preferred stock, designated (in shares) 4,285,714 4,285,714
Preferred stock, issued (in shares) 425,264 532,594
Preferred stock, outstanding (in shares) 425,264 532,594