Stock Compensation Information (Summary Of Equity-Based Compensation Expense From Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	$ 53	$ 176
Direct Costs Of Revenue [Member]
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	5	10
Product Development [Member]
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	13	25
Selling, General And Administrative [Member]
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	$ 35	$ 141