Significant Accounting Policies (Schedule of Basic and Diluted Income per Share) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Numerator
Net (loss) income	$ (481,551)	$ 116,541	$ (1,248,629)	$ (388,907)
Denominator
Weighted average common shares outstanding	13,587,535	11,479,845	13,548,672	11,402,751
Denominator	13,587,535	12,140,263	13,548,672	11,402,751
Basic [Member]
Numerator
Net income applicable to common stock	$ 116,541
Convertible debt interest
Net (loss) income	$ 116,541
Denominator
Weighted average common shares outstanding	11,479,845
Convertible debt
Warrants and options
Denominator	11,479,845
Net income per share	$ 0.01
Diluted [Member]
Numerator
Net income applicable to common stock	$ 116,541
Convertible debt interest	8,021
Net (loss) income	$ 124,562
Denominator
Weighted average common shares outstanding	11,479,845
Convertible debt	75,595
Warrants and options	584,823
Denominator	12,140,263
Net income per share	$ 0.01