Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014 Segment	Jan. 31, 2013	Apr. 30, 2013
Segment Information [Abstract]
Number of operating segments			2
Segment Reporting Information [Line Items]
Total revenues	$ 3,997	$ 2,006	$ 20,737	$ 7,693
Income (loss) from operations	1,150	(92)	5,482	1,319
Depreciation and amortization	44	46	139	133
Segment assets	14,687	10,156	14,687	10,156	16,834	[1]
Gaming Business [Member]
Segment Reporting Information [Line Items]
Total revenues	2,944	1,724	18,475	5,356
Income (loss) from operations	1,092	185	5,810	1,350
Depreciation and amortization	23	27	78	83
Segment assets	12,510	8,214	12,510	8,214
Voting Business [Member]
Segment Reporting Information [Line Items]
Total revenues	1,053	282	2,262	2,337
Income (loss) from operations	58	(277)	(328)	(31)
Depreciation and amortization	21	19	61	50
Segment assets	$ 2,177	$ 1,942	$ 2,177	$ 1,942

[1] Derived from the consolidated audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended April 30, 2013 filed with the SEC.