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RECEIVABLES (Details) - USD ($)
$ in Thousands
Jan. 31, 2019
Apr. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts Receivable, Gross $ 5,974 $ 6,215
Less allowance for doubtful accounts (313) (314)
Accounts Receivable, Net 5,661 5,901
Fulfillment service    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts Receivable, Gross 5,769 6,189
Real estate operations    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts Receivable, Gross 179 10
Corporate operations    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts Receivable, Gross $ 26 $ 16