Fair Value, Liabilities Measured on Recurring Basis (Details)	3 Months Ended
	Jul. 31, 2015 USD ($)
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 1	$ 0
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 2	0
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 3	0
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 4	0
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 5	(39,615)
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 6	0
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 7	0
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 8	0
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 9	(39,615)
Derivative Financial Instruments And Risk Management Fair Value, Liabilities Measured On Recurring Basis 10	$ 0