RECEIVABLES: (Details) - USD ($) $ in Thousands	Apr. 30, 2017	Apr. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	$ 6,727	$ 7,705
Less allowance for doubtful accounts	(348)	(434)
Accounts Receivable, Net	6,379	7,271
Fulfillment services [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	6,725	7,357
Corporate Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	$ 2	$ 348