Summary of Significant Accounting Policies - Schedule of Trade Channel Net Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Disaggregation Of Revenue [Line Items]
Total net sales	$ 276,687	$ 167,379	$ 177,363
Change in Total net sales	$ 109,308
% Change in Total net sales	65.30%
E-Commerce Channels
Disaggregation Of Revenue [Line Items]
Total net sales	$ 108,726	54,316	47,429
Change in Total net sales	$ 54,410
% Change in Total net sales	100.20%
Traditional Channels
Disaggregation Of Revenue [Line Items]
Total net sales	$ 167,961	$ 113,063	$ 129,934
Change in Total net sales	$ 54,898
% Change in Total net sales	48.60%