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FAIR VALUE MEASUREMENTS (Details 1) (USD $)		9 Months Ended
FAIR VALUE MEASUREMENTS (Details 1) (USD $)	Apr. 30, 2012 Senior Secured Convertible Notes and Warrants [Member]	Jan. 31, 2013 Senior Secured Convertible Notes [Member]	Jan. 31, 2013 Senior Secured Convertible Warrants [Member]
Balance at beginning of year	$ 0		$ 0
Additions to derivative instruments		2,615,861	1,628,155
Change in fair value of derivative liabilities		385,445	317,129
Balance at end of period	$ 0	$ 3,001,306	$ 1,945,284

Amount of increase (decrease) of liabilities measured at fair value on a recurring basis using unobservable inputs (level 3) which have taken place during the period. Such increase (decrease) may be comprised of changes in fair value (gains or losses) whether realized or unrealized that have been included in earnings, changed net asset value, or other comprehensive income (a separate component of shareholders' equity); purchases, sales, issues, or settlements of assets; and net transfers in to or out of this category within the fair value hierarchy.

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