Unaudited Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 27, 2021	Feb. 29, 2020	Feb. 27, 2021	Feb. 29, 2020
Net sales	$ 45,235	$ 38,249	$ 126,465	$ 118,536
Cost of sales	29,469	25,579	83,997	80,235
Gross profit	15,766	12,670	42,468	38,301
Selling, general and administrative expenses	15,457	12,659	41,924	38,667
(Gain) loss on disposal of assets	(6)		(6)	1
Operating income (loss)	315	11	550	(367)
Other expense (income):
Investment/interest income	(15)	(97)	(48)	(340)
Foreign exchange loss	65	28	650	117
Other, net	(25)	(8)	(61)	(24)
Total other expense (income)	25	(77)	541	(247)
Income (loss) before income taxes	290	88	9	(120)
Income tax provision	62	181	239	438
Net income (loss)	228	(93)	(230)	(558)
Foreign currency translation gain (loss), net of tax	353	(60)	2,966	(554)
Comprehensive income (loss)	$ 581	$ (153)	$ 2,736	$ (1,112)
Weighted average number of shares:
Common shares - Diluted	13,280	13,135	13,194	13,119
Common Stock
Net income (loss) per share
Common shares - Basic	$ 0.02	$ (0.01)	$ (0.02)	$ (0.04)
Common shares - Diluted	$ 0.02	$ (0.01)	$ (0.02)	$ (0.04)
Weighted average number of shares:
Common shares - Basic	11,111	11,038	11,097	11,022
Common shares - Diluted	11,183	11,038	11,097	11,022
Dividends per share	$ 0.060	$ 0.060	$ 0.180	$ 0.180
Common Class B
Net income (loss) per share
Common shares - Basic	0.02	(0.01)	(0.02)	(0.04)
Common shares - Diluted	$ 0.02	$ (0.01)	$ (0.02)	$ (0.04)
Weighted average number of shares:
Common shares - Basic	2,097	2,097	2,097	2,097
Common shares - Diluted	2,097	2,097	2,097	2,097
Dividends per share	$ 0.054	$ 0.054	$ 0.162	$ 0.162