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ACCOUNTS PAYABLE AND ACCRUED EXPENSES: (Tables)
 12 Months Ended
Apr. 30, 2017
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Accounts payable and accrued expenses consist of:
 
 
 
April 30,
 
 
 
2017
 
2016
 
 
 
(in thousands)
 
 
 
 
 
 
 
Fulfillment services
 
$
5,637
 
$
6,712
 
Real estate operations
 
 
1,138
 
 
1,464
 
Corporate operations
 
 
260
 
 
277
 
 
 
$
7,035
 
$
8,453