Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Mar. 01, 2014	Feb. 28, 2015	Mar. 01, 2014
Net Sales	$ 33,471,000	$ 32,884,000	$ 102,011,000	$ 102,577,000
Cost of Sales	23,671,000	23,233,000	71,091,000	71,727,000
Gross profit	9,800,000	9,651,000	30,920,000	30,850,000
Selling, general, and administrative expenses	12,563,000	10,537,000	36,366,000	31,079,000
Gain on disposal of assets	(14,000)	0	(5,000)	0
Operating loss	(2,749,000)	(886,000)	(5,441,000)	(229,000)
Other (income) expense:
Investment/interest income	(239,000)	(277,000)	(744,000)	(797,000)
Foreign exchange (gain) loss	(275,000)	31,000	(285,000)	123,000
Other, net	(6,000)	(21,000)	(22,000)	(36,000)
Total other income	(520,000)	(699,000)	(1,051,000)	(3,257,000)
Income (loss) from continuing operations before income taxes	(2,229,000)	(187,000)	(4,390,000)	3,028,000
Income tax provision (benefit)	(31,000)	(75,000)	(965,000)	530,000
Income (loss) from continuing operations	(2,198,000)	(112,000)	(3,425,000)	2,498,000
Income (loss) from discontinued operations, net of tax	0	(420,000)	87,000	(538,000)
Net income (loss)	(2,198,000)	(532,000)	(3,338,000)	1,960,000
Foreign currency translation gain (loss), net of tax	(2,188,000)	258,000	(6,149,000)	1,879,000
Fair value adjustments on investments	5,000	6,000	30,000	29,000
Comprehensive income (loss)	(4,381,000)	(268,000)	(9,457,000)	3,868,000
Common Stock
Net income per common share-Basic:
Income from continuing operations	$ (0.16)	$ (0.01)	$ (0.25)	$ 0.18
Income (loss) from discontinued operations	$ 0.00	$ (0.03)	$ 0.01	$ (0.04)
Total net income per common share-Basic:	$ (0.16)	$ (0.04)	$ (0.24)	$ 0.14
Net income per Common share - Diluted:
Income from continuing operations	$ (0.16)	$ (0.01)	$ (0.25)	$ 0.17
Income (loss) from discontinued operations	$ 0.00	$ (0.03)	$ 0.01	$ (0.04)
Total net income per Common share - Diluted:	$ (0.16)	$ (0.04)	$ (0.24)	$ 0.13
Weighted average number of shares:
Common shares - Basic	11,604,000	11,832,000	11,733,000	11,942,000
Common shares - Diluted	13,745,000	14,140,000	13,887,000	14,335,000
Dividends per common share	$ 0.060	$ 0.060	$ 0.180	$ 0.180
Class B Common Stock
Net income per common share-Basic:
Income from continuing operations	$ (0.15)	$ (0.01)	$ (0.22)	$ 0.16
Income (loss) from discontinued operations	$ 0.00	$ (0.03)	$ 0.01	$ (0.03)
Total net income per common share-Basic:	$ (0.15)	$ (0.04)	$ (0.21)	$ 0.13
Net income per Common share - Diluted:
Income from continuing operations	$ (0.15)	$ (0.01)	$ (0.22)	$ 0.16
Income (loss) from discontinued operations	$ 0.00	$ (0.03)	$ 0.01	$ (0.03)
Total net income per Common share - Diluted:	$ (0.15)	$ (0.04)	$ (0.21)	$ 0.13
Weighted average number of shares:
Common shares - Basic	2,141,000	2,191,000	2,154,000	2,270,000
Common shares - Diluted	2,141,000	2,191,000	2,154,000	2,270,000
Dividends per common share	$ 0.054	$ 0.054	$ 0.162	$ 0.162
Anti-trust class action lawsuit settlement [Domain]
Other (income) expense:
Other, net	$ 0	$ (432,000)	$ 0	$ (2,547,000)