Segment Reporting - Schedule of Net Sales and Gross Profit by Geographic Region (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2019	Dec. 01, 2018	Nov. 30, 2019	Dec. 01, 2018
Segment Reporting Information [Line Items]
Net Sales		$ 39,634	$ 41,314	$ 80,287	$ 85,471
Gross Profit		12,680	12,971	25,631	26,924
North America
Segment Reporting Information [Line Items]
Net Sales		15,306	16,825	32,540	33,848
Gross Profit		5,797	6,518	12,104	13,105
Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales		9,277	8,520	17,800	18,062
Gross Profit		3,056	2,701	5,649	5,706
Europe
Segment Reporting Information [Line Items]
Net Sales		13,210	13,393	26,134	28,149
Gross Profit		4,015	4,215	8,146	8,738
Latin America
Segment Reporting Information [Line Items]
Net Sales		1,859	2,559	3,837	5,373
Gross Profit		644	955	1,344	2,021
Other
Segment Reporting Information [Line Items]
Net Sales	[1]	(18)	17	(24)	39
Gross Profit	[1]	$ (832)	$ (1,418)	$ (1,612)	$ (2,646)

[1] Other includes primarily net sales not allocated to a specific geographical region, unabsorbed value-add costs and other unallocated expenses.