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RECEIVABLES (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Oct. 31, 2017
Oct. 31, 2016
Dec. 01, 2017
Apr. 30, 2017
Revenues, Total [1] $ 9,175,000 $ 11,465,000 $ 20,501,000 $ 23,673,000    
Accounts Receivable, Net 6,378,000   6,378,000     $ 6,379,000
Customer Concentration Risk [Member]            
Revenues, Total     $ 2,164,000      
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]            
Concentration Risk, Percentage     10.60%      
Fulfillment Services [Member]            
Revenues, Total [1] 7,673,000 $ 7,858,000 [2] $ 16,234,000 [2] $ 15,686,000 [2]    
Fulfillment Services [Member] | Customer Concentration Risk [Member]            
Accounts Receivable, Net $ 706,000   $ 706,000      
Fulfillment Services [Member] | Customer Concentration Risk [Member] | Subsequent Event [Member]            
Accounts Receivable, Net         $ 363,000  
[1] Revenue information provided for each segment includes amounts grouped as Other in the accompanying consolidated statements of operations. Corporate and Other is net of intercompany eliminations.
[2] Fulfillment services revenues and EBITDA for the six months ending October 31, 2017 included a pre-tax gain of $1,318,000 resulting from the settlement agreement with the State of Florida (see Note 6).