Significant Accounting Policies (Schedule of Basic and Diluted Income per Share) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Numerator
Net loss	$ (2,147,945)	$ 7,377	$ (3,396,575)	$ (381,530)
Denominator
Weighted average common shares outstanding	14,491,634	11,467,345	13,862,992	11,419,270
Denominator	14,491,634	13,040,970	13,862,992	11,419,270
Basic [Member]
Numerator
Net income applicable to common stock		$ 7,377
Convertible debt interest
Net loss		$ 7,377
Denominator
Weighted average common shares outstanding		11,467,345
Convertible debt
Warrants and options
Denominator		11,467,345
Net income per share		$ 0.00
Diluted [Member]
Numerator
Net income applicable to common stock		$ 7,377
Convertible debt interest		4,010
Net loss		$ 11,387
Denominator
Weighted average common shares outstanding		11,467,345
Convertible debt		75,596
Warrants and options		1,498,029
Denominator		13,040,970
Net income per share		$ 0.00