Segment and Geographic Information - Schedule of Reconciliation of Assets from Segment to Consolidated (Details) - USD ($)		May 28, 2022	May 29, 2021
Segment Reporting [Abstract]
Segment assets		$ 120,696,000	$ 100,638,000
Cash and cash equivalents		35,495,000	43,316,000
Investments - current		5,000,000	0
Other current assets	[1]	2,686,000	1,918,000
Net property, plant and equipment		9,435,000	9,300,000
Operating lease ROU asset		1,894,000	732,000
Financing lease ROU asset		215,000	308,000
Other assets - non-current deferred income taxes		4,398,000	541,000
Total assets		$ 179,819,000	$ 156,753,000

[1] Other current assets include miscellaneous receivables and prepaid expenses.