Stock Compensation Information (Summary Of Equity-Based Compensation Expense From Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	$ 25	$ 39	$ 52	$ 92
Direct Costs of Revenue [Member]
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	4	4	6	9
Product Development
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	2	6	5	19
Selling, General and Administrative[Member]
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	$ 19	$ 29	$ 41	$ 64