Significant Accounting Policies (Schedule of Basic and diluted income per share) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Numerator
Net income (loss)	$ 116,541	$ (744,420)	$ (388,907)	$ (1,463,126)
Denominator
Weighted average common shares outstanding	137,758,145	128,303,606	136,833,008	128,239,022
Denominator	145,683,166	128,303,606	136,833,008	128,239,022
Basic [Member]
Numerator
Net income applicable to common stock	$ 116,541
Convertible debt interest
Net income (loss)	$ 116,541
Denominator
Weighted average common shares outstanding	137,758,145
Convertible debt
Warrants and options
Denominator	137,758,145
Net income per share	$ 0
Diluted [Member]
Numerator
Net income applicable to common stock	$ 116,541
Convertible debt interest	8,021
Net income (loss)	$ 124,562
Denominator
Weighted average common shares outstanding	137,758,145
Convertible debt	907,143
Warrants and options	7,017,878
Denominator	145,683,166
Net income per share	$ 0