Intangible Assets and Trademarks (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Apr. 30, 2019
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangibles, gross	$ 274,000	$ 274,000
Less accumulated amortization	(106,556)	(60,889)
Intangibles, net	167,444	213,111
Trademarks, net
Finite-Lived Intangible Assets [Line Items]
Intangibles, gross	10,000	10,000
Less accumulated amortization	(7,778)	(4,445)
Intangibles, net	$ 2,222	$ 5,555