ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Apr. 30, 2017
Accounts Payable and Accrued Liabilities Disclosure [Line Items]
Accounts payable, net and accrued expenses	$ 9,187	$ 7,035
Fulfillment services [Member]
Accounts Payable and Accrued Liabilities Disclosure [Line Items]
Accounts payable, net and accrued expenses	5,420	5,637
Real estate
Accounts Payable and Accrued Liabilities Disclosure [Line Items]
Accounts payable, net and accrued expenses	3,356	1,138
Corporate
Accounts Payable and Accrued Liabilities Disclosure [Line Items]
Accounts payable, net and accrued expenses	$ 411	$ 260