Schedule of Warrant Liabilities at Fair Value (Details) (USD $)	9 Months Ended
	Jan. 31, 2015
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 1	$ 0
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 2	9,830
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 3	0
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 4	0
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 5	0
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 6	180,396
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 7	0
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 8	(190,226)
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 9	0
Derivative Financial Instruments And Risk Management Schedule Of Warrant Liabilities At Fair Value 10	$ 0