Stock Compensation Information (Summary Of Equity-Based Compensation Expense From Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	$ 38	$ 161	$ 130	$ 492
Direct Costs Of Revenue [Member]
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	3	9	12	27
Product Development [Member]
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	5	21	24	70
Selling, General, And Administrative [Member]
Employee Service Share-based Compensation, Allocation Of Recognized Period Costs [Line Items]
Total equity based compensation	$ 30	$ 131	$ 94	$ 395