CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012
Income tax provision (benefit) from operations of discontinued operations	$ (31,913)	$ 1,954,051	$ 110,518	$ 1,837,728