CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jan. 31, 2015	Apr. 30, 2014
Allowance for accounts receivable	$ 1,141,000	$ 1,034,000
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
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	14,513,164	13,913,164
Common stock, shares outstanding	14,513,164	13,913,164
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	8,538,567	8,538,567
Convertible Series F-1 [Member]
Preferred stock, shares issued	10,575	0
Preferred Stock, Shares Outstanding	10,575	0
Preferred Stock, liquidation preference	16,960,709	16,960,709
Convertible Series G [Member]
Preferred stock, par value	$ 350.43
Preferred stock, shares issued	2,088	0
Preferred Stock, Shares Outstanding	2,088	0
Preferred Stock, liquidation preference	3,384,307	3,384,307
Convertible Series G-1 [Member]
Preferred stock, shares issued	3,442	0
Preferred Stock, Shares Outstanding	3,442	0
Preferred Stock, liquidation preference	$ 5,559,704	$ 5,559,704