Stockholders' Equity (Summary Of Equity-Based Compensation Expense From Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity based compensation	$ 593	$ 921	$ 960
Direct Costs of Revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity based compensation	35	72	63
Product Development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity based compensation	92	152	154
Selling, General and Administrative[Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity based compensation	$ 466	$ 697	$ 743