ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details Textual) - USD ($)	Jan. 31, 2017	Apr. 30, 2016
Accounts Payable and Accrued Liabilities Disclosure [Line Items]
Accrued Liabilities	$ 1,448,000	$ 1,998,000
Customer Postage Deposits Current And Noncurrent	3,797,000	3,947,000
Accounts Payable, Trade	530,000	837,000
Other Accounts Payable and Accrued Liabilities	$ 1,188,000	$ 1,671,000