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OTHER ASSETS - Additional Information (Details)
12 Months Ended
Apr. 30, 2022
USD ($)
ft²
Apr. 30, 2021
USD ($)
Office building    
Area of Land | ft² 7,000  
Property and equipment | Right of use assets    
Amortization of leased cost $ 70,000 $ 18,000
Right of use assets    
Depreciation expense associated with property and equipment $ 24,000 $ 11,000