Segment Reporting - Schedule of Operating Results by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 28, 2020	Nov. 30, 2019	Nov. 28, 2020	Nov. 30, 2019
Segment Reporting Information [Line Items]
Net Sales	$ 42,418	$ 39,634	$ 81,230	$ 80,287
Gross Profit	14,343	12,680	26,702	25,631
PMT
Segment Reporting Information [Line Items]
Net Sales	32,929	29,603	63,181	60,170
Gross Profit	11,251	9,349	21,222	19,028
Canvys
Segment Reporting Information [Line Items]
Net Sales	6,701	7,856	13,413	15,133
Gross Profit	2,379	2,585	4,663	4,906
Healthcare
Segment Reporting Information [Line Items]
Net Sales	2,788	2,175	4,636	4,984
Gross Profit	$ 713	$ 746	$ 817	$ 1,697