Quarterly report [Sections 13 or 15(d)]

FAIR VALUE MEASUREMENTS (Details - Changes in fair value of warrant liability)

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FAIR VALUE MEASUREMENTS (Details - Changes in fair value of warrant liability) - USD ($)
3 Months Ended 6 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Oct. 31, 2025
Oct. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Change in fair value $ (10,474,000) $ 1,829,000 $ (10,231,000) $ 3,913,000
Fair Value, Recurring [Member] | Warrant Liability [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair value, beginning 458,000   338,000  
Issuance of warrants 5,220,000   5,583,000  
Change in fair value 10,474,000   10,231,000  
Fair value, ending $ 16,152,000   $ 16,152,000