CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) (USD $)	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Notes payable issuance costs		$ 251,000
Common Stock
Stock Issuance costs	1,504,000	1,232,000	1,151,000
Series E Preferred Stock [Member]
Stock Issuance costs	$ 1,458,000