Segment Information (Schedule Of Segment Reporting Information By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014	Apr. 30, 2014
Segment Reporting Information [Line Items]
Revenues	$ 5,694us-gaap_Revenues	$ 7,888us-gaap_Revenues	$ 19,008us-gaap_Revenues	$ 23,588us-gaap_Revenues
Operating Expenses	6,055us-gaap_OperatingExpenses	8,166us-gaap_OperatingExpenses	18,942us-gaap_OperatingExpenses	23,924us-gaap_OperatingExpenses
Operating Income (Loss)	(361)us-gaap_OperatingIncomeLoss	(278)us-gaap_OperatingIncomeLoss	66us-gaap_OperatingIncomeLoss	(336)us-gaap_OperatingIncomeLoss
Assets	27,618us-gaap_Assets		27,618us-gaap_Assets		33,653us-gaap_Assets
Unallocated Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Operating Expenses	1,169	2,109	4,055	5,659
Operating Income (Loss)	(1,169)	(2,109)	(4,055)	(5,659)
Information Governance [Member]
Segment Reporting Information [Line Items]
Revenues	3,142	4,779	11,100	14,936
Operating Expenses	3,282	4,438	9,935	13,423
Operating Income (Loss)	(140)	341	1,165	1,513
Assets	24,141		24,141		28,242
Migration and Development Tools [Member]
Segment Reporting Information [Line Items]
Revenues	2,552	3,109	7,908	8,652
Operating Expenses	1,604	1,619	4,952	4,842
Operating Income (Loss)	948	1,490	2,956	3,810
Assets	$ 3,477		$ 3,477		$ 5,411

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.18)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 18

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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Balance Type:	credit
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- Details

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- Details

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- Details

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- Details

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