CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Apr. 30, 2015	Apr. 30, 2014
Allowance for accounts receivable	$ 92,000	$ 100,000
Debt discount of senior secured convertible notes	$ 0	$ 853,000
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	2,088
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	982,660	632,417
Common stock, shares outstanding	982,660	632,417
Convertible Series E [Member]
Preferred stock, shares issued	0	2,438
Preferred Stock, Shares Outstanding	0	2,438
Preferred Stock, liquidation preference	$ 0	$ 5,617,000
Convertible Series F [Member]
Preferred stock, par value	$ 301.81
Preferred stock, shares issued	5,268	0
Preferred Stock, Shares Outstanding	5,268	0
Preferred Stock, liquidation preference	$ 8,706,233	$ 8,706,233
Convertible Series F-1 [Member]
Preferred stock, shares issued	5,642	0
Preferred Stock, Shares Outstanding	5,642	0
Preferred Stock, liquidation preference	$ 9,247,065	$ 9,247,065
Convertible Series G [Member]
Preferred stock, par value	$ 350.43
Preferred stock, shares issued	2,088	0
Preferred Stock, Shares Outstanding	2,088	2,088
Preferred Stock, liquidation preference	$ 4,206,577	$ 4,206,577
Convertible Series G-1 [Member]
Preferred stock, shares issued	3,128	0
Preferred Stock, Shares Outstanding	3,128	0
Preferred Stock, liquidation preference	$ 6,269,028	$ 6,269,028