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Condensed Consolidated Statements of Operations (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2011	Oct. 31, 2010
Income Statement [Abstract]
Tax (benefit) from operations of discontinued operations	$ (226,645)	$ 256,890	$ (188,819)	$ 370,882

Tax expense or benefit on the gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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