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, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity based compensation	$ 154	$ 246	$ 330	$ 473
Direct Costs of Revenue [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity based compensation	8	19	18	37
Product Development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity based compensation	23	40	48	79
Selling, General and Administrative[Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity based compensation	$ 123	$ 187	$ 264	$ 357