Stockholders' Deficit - Summary of Information and Activity Relating to Outstanding and Exercisable Warrants (Details)	6 Months Ended
	Oct. 31, 2018 $ / shares shares
Warrant One [Member]
Number of Warrants Outstanding | shares	2,160,000
Weighted Average Remaining Contractual life (in years)	4 years 7 months 6 days	[1]
Weighted Average Exercise Price, Outstanding | $ / shares	$ 0.22	[1]
Number of Warrants Exercisable | shares	2,160,000
Weighted Average Exercise Price, Exercisable | $ / shares	$ 0.22	[1]
Warrant Two [Member]
Number of Warrants Outstanding | shares	333,333
Weighted Average Remaining Contractual life (in years)	3 years 10 months 25 days	[1]
Weighted Average Exercise Price, Outstanding | $ / shares	$ 0.15	[1]
Number of Warrants Exercisable | shares	333,333
Weighted Average Exercise Price, Exercisable | $ / shares	$ 0.15	[1]

[1] Between April 2018 and October 2018, in conjunction with the sale, in the aggregate, of 2,160,000 shares of its common stock pursuant to stock subscription agreements, the Company granted warrants to purchase up to 2,160,000 shares of its common stock at a price determined by the average trading price per share of the Company common stock.