OTHER ASSETS (Details) - USD ($) $ in Thousands	Jan. 31, 2018	Apr. 30, 2017
Prepaid Expense and Other Assets	$ 2,238	$ 2,310
Prepaid Expenses [Member]
Prepaid expenses	1,426	1,491
Deferred Order Entry Costs [Member]
Deferred order entry costs	533	553
Other Intangible Assets [Member]
Other	$ 279	$ 266