Net Loss Per Common Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Total	3,778,400	716,125
Preferred Stock [Member]
Total	1,990,606	47,368
Restricted Stock Units [Member]
Total	32,500	32,500
Stock Options [Member]
Total	96,875	136,896
Stock Warrants [Member]
Total	1,658,419	499,361