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OTHER ASSETS (Details) - USD ($)
$ in Thousands
Oct. 31, 2017
Apr. 30, 2017
Prepaid Expense and Other Assets $ 2,262 $ 2,310
Prepaid Expenses [Member]    
Prepaid expenses 1,467 1,491
Deferred Order Entry Costs [Member]    
Deferred order entry costs 524 553
Other Intangible Assets [Member]    
Other $ 271 $ 266