Unaudited Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 03, 2018	Feb. 25, 2017	Mar. 03, 2018	Feb. 25, 2017
Net sales	$ 41,645	$ 32,313	$ 117,722	$ 99,513
Cost of sales	27,578	21,621	78,133	67,617
Gross profit	14,067	10,692	39,589	31,896
Selling, general and administrative expenses	13,097	12,002	38,023	37,697
Loss (gain) on disposal of assets	3		(188)
Operating income (loss)	967	(1,310)	1,754	(5,801)
Other (income) expense:
Investment/interest income	(208)	(67)	(378)	(129)
Foreign exchange loss	159	214	475	311
Other, net	1	(16)	(14)
Total other (income) expense	(48)	131	83	182
Income (loss) from continuing operations before income taxes	1,015	(1,441)	1,671	(5,983)
Income tax provision (benefit)	488	(10)	1,084	820
Income (loss) from continuing operations	527	(1,431)	587	(6,803)
Income from discontinued operations			1,496
Net income (loss)	527	(1,431)	2,083	(6,803)
Foreign currency translation gain (loss), net of tax	1,646	508	3,997	(1,736)
Fair value adjustments on investments (loss) gain	(164)	27	(130)	40
Comprehensive income (loss)	2,009	(896)	$ 5,950	$ (8,499)
Common Stock [Member]
Other (income) expense:
Net income (loss)	$ 527	$ (1,431)
Income (loss) from continuing operations	$ 0.04	$ (0.11)	$ 0.05	$ (0.54)
Income from discontinued operations			0.12
Total net income (loss) per Common share - Basic	0.04	(0.11)	0.17	(0.54)
Net income (loss) per Common share - Diluted:
Income (loss) from continuing operations	0.04	(0.11)	0.05	(0.54)
Income from discontinued operations			0.12
Total net income (loss) per share - Diluted	$ 0.04	$ (0.11)	$ 0.17	$ (0.54)
Weighted average number of shares:
Common shares - Basic	10,792	10,706	10,753	10,704
Common shares - Diluted	10,872	10,706	10,793	10,704
Dividends per share	$ 0.060	$ 0.060	$ 0.180	$ 0.180
Class B Common [Member]
Other (income) expense:
Net income (loss)	$ 527	$ (1,431)
Income (loss) from continuing operations	$ 0.04	$ (0.10)	0.04	(0.48)
Income from discontinued operations			0.11
Total net income (loss) per Common share - Basic	0.04	(0.10)	0.15	(0.48)
Net income (loss) per Common share - Diluted:
Income (loss) from continuing operations	0.04	(0.10)	0.04	(0.48)
Income from discontinued operations			0.11
Total net income (loss) per share - Diluted	$ 0.04	$ (0.10)	$ 0.15	$ (0.48)
Weighted average number of shares:
Common shares - Basic	2,137	2,141	2,137	2,141
Common shares - Diluted	2,137	2,141	2,137	2,141
Dividends per share	$ 0.054	$ 0.054	$ 0.162	$ 0.162