Segment Disclosure - Net Sales and Long-lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019	May 02, 2020
Net sales:
Net sales	$ 127,367	$ 174,911	$ 271,011	$ 355,167
Long-lived assets:
Long-lived assets	64,475		64,475		$ 67,484
United States
Net sales:
Net sales	108,453	147,106	236,522	296,566
Long-lived assets:
Long-lived assets	55,522		55,522		58,422
Outside United States
Net sales:
Net sales	18,914	$ 27,805	34,489	$ 58,601
Long-lived assets:
Long-lived assets	$ 8,953		$ 8,953		$ 9,062