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RECEIVABLES: (Details) - USD ($)
$ in Thousands
Apr. 30, 2015
Apr. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts Receivable, Gross $ 11,709 $ 11,406
Less allowance for doubtful accounts (444) (450)
Accounts Receivable, Net 11,265 10,956
Fulfillment Services [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts Receivable, Gross 7,993 11,406
Buyer Promissory Note [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 1,600 0
Line of Credit receivable [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts Receivable, Gross 2,000  
Financing Receivable, Gross   0
Real Estate Operations and Corporate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts Receivable, Gross $ 116 $ 0