Summary of Significant Accounting Policies (Details Narrative)	3 Months Ended	9 Months Ended
	Jan. 31, 2020 USD ($)	Jan. 31, 2020 USD ($)
Impairment of goodwill
Income tax examination, likelihood of unfavorable settlement		Tax positions that meet the more likely than not recognition threshold are measured at the largest amount of tax benefit that is more than 50 percent likely of being realized upon settlement with the applicable taxing authority.
Tax refund under th tax cuts and jobs act	$ 219,073	$ 219,073
Series F Convertible Preferred Shares [Member]
Preferred stock, deemed dividend	$ 0	$ 2,022,712