Income Taxes (Summary Of Income (Loss) Before Income Taxes And Provision (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Income Taxes [Abstract]
Domestic	$ 774	$ (16,436)	$ (14,017)
Foreign	40	(73)	(2,593)
Income (loss) before income taxes	814	(16,509)	(16,610)
Current: Foreign taxes	89	(74)	52
Current: Federal and state income taxes	3	83	4
Total Current	92	9	56
Deferred: Foreign taxes			(91)
Deferred: Federal and state income taxes	190	144	90
Total Deferred	190	144	(1)
Income Tax Expense (Benefit), Total	$ 282	$ 153	$ 55