Acquisition and Disposition - Schedule of Discontinued Operations (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018	Apr. 30, 2018
Business Combinations [Abstract]
Revenues					$ 7,885,310
Cost of sales					6,653,363
Gross profit					1,231,947
Operating and other non-operating expenses (including impairment charge of 6,094,760)					(7,406,271)
Gain from extinguishment of liabilities				$ 248,684	248,684
Loss from discontinued operations		$ 3,428		(5,925,640)	(5,925,640)
Gain from sale of discontinued operations		(7,538)		94,485	94,485
Total loss from discontinued operations		$ (4,110)		$ (5,831,155)	$ (5,831,155)