Segment Reporting - Schedule of Net Sales and Gross Profit by Geographic Region (Details) - USD ($) $ in Thousands		3 Months Ended
		Aug. 31, 2019	Sep. 01, 2018
Segment Reporting Information [Line Items]
Net Sales		$ 40,653	$ 44,157
Gross Profit		12,951	13,953
North America
Segment Reporting Information [Line Items]
Net Sales		17,234	17,023
Gross Profit		6,307	6,587
Asia/Pacific
Segment Reporting Information [Line Items]
Net Sales		8,523	9,542
Gross Profit		2,593	3,005
Europe
Segment Reporting Information [Line Items]
Net Sales		12,924	14,756
Gross Profit		4,131	4,523
Latin America
Segment Reporting Information [Line Items]
Net Sales		1,978	2,814
Gross Profit		700	1,066
Other
Segment Reporting Information [Line Items]
Net Sales	[1]	(6)	22
Gross Profit	[1]	$ (780)	$ (1,228)

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