Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Total	900,227	367,082
Preferred Stock [Member]
Total	20,357
Restricted Stock Units [Member]
Total	33,117	51,200
Stock Options [Member]
Total	100,000	145,646
Stock Warrants [Member]
Total	746,753	170,236