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NOTES PAYABLE (Details) - USD ($)
$ in Thousands
Apr. 30, 2021
Apr. 30, 2020
NOTES PAYABLE:    
Notes Payable $ 3,448 $ 3,890
Real estate notes payable [Member]    
NOTES PAYABLE:    
Notes Payable 3,482 3,894
Unamortized debt issuance costs [Member]    
NOTES PAYABLE:    
Notes Payable $ (34) $ (4)