CONDENSED CONSOLIDATED BALANCE SHEETS [Parenthetical] - USD ($)	Jul. 31, 2016	Apr. 30, 2016
Allowance for accounts receivable	$ 92,000	$ 92,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	2,706,159	2,691,055
Common stock, shares outstanding	2,706,159	2,691,055
Convertible Series H [Member]
Preferred stock, shares authorized	8,500
Preferred stock, shares issued	2,638	2,638
Preferred Stock, Shares Outstanding	2,638	2,638
Preferred Stock, liquidation preference (in dollars)	$ 406,000	$ 406,000
Convertible Series H-1 [Member]
Preferred stock, shares authorized	9,488
Preferred stock, shares issued	8,119	8,119
Preferred Stock, Shares Outstanding	8,119	8,119
Preferred Stock, liquidation preference (in dollars)	$ 1,348,000	$ 1,348,000