Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 29, 2023	Jul. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 35,095	$ 46,467
Mainland China
Disaggregation of Revenue [Line Items]
Total revenue	16,081	22,757
United States
Disaggregation of Revenue [Line Items]
Total revenue	6,415	12,072
Hong Kong
Disaggregation of Revenue [Line Items]
Total revenue	1,990	4,765
Taiwan
Disaggregation of Revenue [Line Items]
Total revenue	5,346	67
Rest of World
Disaggregation of Revenue [Line Items]
Total revenue	$ 5,263	$ 6,806