Schedule of Stockholders' Equity Note, Warrants or Rights, Valuation Assumptions (Details) (USD $)	6 Months Ended
	Oct. 31, 2013 Y
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 1	$ 0
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 2	0.11%
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 3	1.60%
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 4	0
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 5	70.00%
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 6	70.00%
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 7	0
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 8	0.12
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 9	1.5
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 10	2
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 11	$ 0
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 12	0.00%
Common Stock Schedule Of Stockholders' Equity Note, Warrants Or Rights, Valuation Assumptions 13	0.00%