Background and Basis of Presentation - Additional Information (Details) $ in Millions	4 Months Ended	12 Months Ended
	Aug. 24, 2020 USD ($)	Apr. 30, 2021 BrandLane	Apr. 30, 2020 USD ($)	Apr. 30, 2019 USD ($)
Background And Basis Of Presentation [Line Items]
Number of brand lanes | BrandLane		4
Corporate expenses	$ 2.7		$ 8.7	$ 9.9
Distribution expenses	$ 1.9		8.2
Deferred Income Taxes Non Current
Background And Basis Of Presentation [Line Items]
Deferred income taxes			$ 3.6