Long-Term Debt (Schedule Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Jul. 31, 2015	Apr. 30, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Capital leases		$ 22
Total debt	$ 9,813	11,839
Less current portion	(755)	(1,029)
Total long term debt, net	9,058	10,810
Term Note A [Member]
Debt Instrument [Line Items]
Term loan amount	7,313	9,317	$ 10,100
Wells Fargo Revolving Line Of Credit [Member]
Debt Instrument [Line Items]
Revolving line of credit	$ 2,500	$ 2,500