ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details Textual) - USD ($)	Jul. 31, 2016	Apr. 30, 2016
Accounts Payable and Accrued Liabilities Disclosure [Line Items]
Accrued Liabilities	$ 2,031,000	$ 1,998,000
Customer Postage Deposits Current And Noncurrent	3,702,000	3,947,000
Accounts Payable, Trade	707,000	837,000
Other Accounts Payable and Accrued Liabilities	$ 1,173,000	$ 1,671,000