Segment Information (Schedule Of Segment Reporting Information By Segment) (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	Apr. 30, 2014
Segment Reporting Information [Line Items]
Revenues	$ 6,652	$ 7,736	$ 13,315	$ 15,700
Operating Expenses	6,283	7,770	12,888	15,758
Operating Income (Loss)	369	(34)	427	(58)
Assets	27,766		27,766		33,653
Unallocated Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Operating Expenses	1,214	1,744	2,887	3,550
Operating Income (Loss)	(1,214)	(1,744)	(2,887)	(3,550)
Information Governance [Member]
Segment Reporting Information [Line Items]
Revenues	3,854	4,741	7,958	10,157
Operating Expenses	3,393	4,327	6,652	8,985
Operating Income (Loss)	461	414	1,306	1,172
Assets	25,326		25,326		28,242
Migration and Development Tools [Member]
Segment Reporting Information [Line Items]
Revenues	2,798	2,995	5,357	5,543
Operating Expenses	1,676	1,699	3,349	3,223
Operating Income (Loss)	1,122	1,296	2,008	2,320
Assets	$ 2,440		$ 2,440		$ 5,411