Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014 Segment	Oct. 31, 2013	Apr. 30, 2014
Segment Information [Abstract]
Number of operating segments			2
Segment Reporting Information [Line Items]
Total revenues	$ 1,103	$ 8,974	$ 3,976	$ 16,740
(Loss) income from operations	(596)	3,211	(521)	4,332
Depreciation and amortization	54	49	113	95
Segment assets	13,264	14,125	13,264	14,125	13,435	[1]
Gaming Business [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	307	8,661	585	15,531
(Loss) income from operations	(584)	3,707	(1,343)	4,718
Depreciation and amortization	32	29	71	55
Segment assets	11,171	12,463	11,171	12,463
Voting Business [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenues	796	313	3,391	1,209
(Loss) income from operations	(12)	(496)	822	(386)
Depreciation and amortization	22	20	42	40
Segment assets	$ 2,093	$ 1,662	$ 2,093	$ 1,662

[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, 2014 filed with the SEC.