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OTHER INCOME (Details) - USD ($)
12 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Other income $ 261,000 $ 1,028,000
Life insurance policy for a retired executive    
Other income 30,000  
Bankruptcy of a warranty provider    
Other income 185,000  
Forgiveness of debt    
Other income 45,000 300,000
Settlement Agreement    
Other income $ 1,028,000 $ 650,000