INCOME TAXES (Details 4) (USD $)	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of the year	$ 7,559,653	$ 1,221,800
Charged to costs and expenses	2,260,442	6,545,615
Reversed to gross tax assets and other accounts		(207,762)
Balance at end of the year	$ 9,820,095	$ 7,559,653