Earnings (Loss) Per Share - Computations of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($)	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Loss per share:
Net loss	$ (854,506)	$ (91,251)
Weighted average basic shares	123,869,895	66,561,304
Weighted average diluted shares	123,869,895	66,561,304
Loss per share: Basic	$ (0.01)	$ (0.00)
Loss per share: Diluted	$ (0.01)	$ (0.00)