CONSOLIDATED BALANCE SHEETS [Parenthetical] - USD ($)	Apr. 30, 2016	Apr. 30, 2015
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	2,691,055	982,660
Common stock, shares outstanding	2,691,055	982,660
Convertible Series F [Member]
Preferred stock, shares authorized	5,268	5,268
Preferred stock, shares issued	0	5,268
Preferred Stock, Shares Outstanding	0	5,268
Convertible Series F-1 [Member]
Preferred stock, shares authorized	27,287	27,287
Preferred stock, shares issued	0	5,642
Preferred Stock, Shares Outstanding	0	5,642
Convertible Series G [Member]
Preferred stock, shares authorized	2,088	2,088
Preferred stock, shares issued	0	2,088
Preferred Stock, Shares Outstanding	0	2,088
Convertible Series G-1 [Member]
Preferred stock, shares authorized	4,247	4,247
Preferred stock, shares issued	0	3,128
Preferred Stock, Shares Outstanding	0	3,128
Convertible Series H [Member]
Preferred stock, shares authorized	8,500	8,500
Preferred stock, shares issued	2,638	0
Preferred Stock, Shares Outstanding	2,638	0
Preferred Stock, liquidation preference (in dollars)	$ 406,000	$ 406,000
Convertible Series H-1 [Member]
Preferred stock, shares authorized	9,488	9,488
Preferred stock, shares issued	8,119	0
Preferred Stock, Shares Outstanding	8,119	0
Preferred Stock, liquidation preference (in dollars)	$ 1,348,000	$ 1,348,000