Income Taxes Schedule of the Components of Income Taxes (Details) (USD $)	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Current Income Tax Expense (Benefit)	$ 0	$ 8,000
Deferred Income Tax Expense (Benefit)	0	(608,000)
Income Tax Expense (Benefit)	$ 0	$ (600,000)