Intangibles (Details) (USD $)	12 Months Ended					0 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2014 Weighted average	Apr. 30, 2013 Weighted average	Apr. 30, 2014 Technology license SG&A	Apr. 30, 2014 Exclusive distribution license SG&A	Apr. 30, 2014 Licenses	Apr. 30, 2013 Licenses
Intangibles
Intangibles, gross							$ 856,000	$ 850,000
Less accumulated amortization							(189,000)	(35,000)
Intangibles, net							667,000	815,000
Weighted average amortization period			3 years	9 years 1 month 6 days
Amortization expense	154,000	35,000
Impairment charge					72,000
Impairment charge						672,000
Estimated amortization expense
2015	223,000
2016	223,000
2017	221,000
Intangibles, net							$ 667,000	$ 815,000