Derivative Liabilities - Summary of Fair Value Measurements Using Significant Unobservable Inputs (Level 3) (Details)	6 Months Ended
	Oct. 31, 2018 USD ($)
Reclassification of derivative to additional paid-in capital	$ (1,187,242)
Level 3 [Member]
Balance – April 30, 2018	30,488,655
Addition of new derivatives recognized as debt discounts	325,000
Other addition of new derivatives	679,032
Reclassification of derivatives due to tainted instruments	258,132
Change in fair value of the derivative	(10,547,737)
Reclassification of derivative to additional paid-in capital	(1,187,242)
Change in derivative liabilities recognized as gain on derivative	(20,015,840)
Balance - October 31, 2018