Segment Information (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	Apr. 30, 2012
Segment Information [Abstract]
Number of operating segments			2
Segment Reporting Information [Line Items]
Total revenues	$ 2,397	$ 1,944	$ 5,687	$ 2,553
Income (loss) from operations	492	(146)	1,411	(896)
Depreciation and amortization	46	34	87	66
Segment assets	8,794	6,970	8,794	6,970	7,982
Gaming Business [Member]
Segment Reporting Information [Line Items]
Total revenues	1,145	1,510	3,632	1,848
Income (loss) from operations	214	149	1,165	(360)
Depreciation and amortization	29	21	56	41
Segment assets	6,830	4,733	6,830	4,733
Voting Business [Member]
Segment Reporting Information [Line Items]
Total revenues	1,252	434	2,055	705
Income (loss) from operations	278	(295)	246	(536)
Depreciation and amortization	17	13	31	25
Segment assets	$ 1,964	$ 2,237	$ 1,964	$ 2,237

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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 7

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

-Publisher FASB

-Name Statement of Financial Accounting Concepts (CON)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher SEC

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

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

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

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