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OTHER ASSETS - Additional Information (Details)
12 Months Ended
Apr. 30, 2025
USD ($)
ft²
Apr. 30, 2024
USD ($)
OTHER ASSETS    
Depreciation $ 179,000 $ 149,000
Use rights    
OTHER ASSETS    
Amortization of leased cost 28,000 26,000
Property and equipment    
OTHER ASSETS    
Depreciation $ 102,000 $ 67,000
Office building    
OTHER ASSETS    
Number of acres | ft² 7,000