Stock-based Compensation and Stockholders’ Equity - Summary of Stock-based Compensation by Income Statement Line Item (Details) - USD ($) $ in Thousands	12 Months Ended
	May 29, 2022	May 30, 2021	May 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 2,608	$ 3,360	$ 2,419
Discontinued Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	(34)	55	44
Cost of sales | Continuing Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	314	348	118
Research and development | Continuing Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	202	223	158
Selling, general and administrative | Continuing Operations
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation	$ 2,126	$ 2,734	$ 2,099