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RECEIVABLES: (Tables)
 12 Months Ended
Apr. 30, 2017
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
 
 
April 30,
 
 
 
2017
 
2016
 
 
 
(in thousands)
 
 
 
 
 
 
 
Fulfillment services
 
$
6,725
 
$
7,357
 
Corporate operations
 
 
2
 
 
348
 
 
 
 
6,727
 
 
7,705
 
Less allowance for doubtful accounts
 
 
(348)
 
 
(434)
 
 
 
$
6,379
 
$
7,271