Background, Description of Business, and Basis of Presentation - Schedule of Geographic Makeup of Net Sales (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Disaggregation of Revenue [Line Items]
Total net sales	$ 60,768	$ 50,468
Change in Total net sales	$ 10,300
% Change in Total net sales	20.40%
Domestic Net Sales
Disaggregation of Revenue [Line Items]
Total net sales	$ 56,530	48,472
Change in Total net sales	$ 8,058
% Change in Total net sales	16.60%
International Net Sales
Disaggregation of Revenue [Line Items]
Total net sales	$ 4,238	$ 1,996
Change in Total net sales	$ 2,242
% Change in Total net sales	112.30%