Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended
	Aug. 31, 2013	Sep. 01, 2012
Net Sales	$ 34,257,000	$ 35,650,000
Cost of Sales	24,065,000	25,004,000
Gross profit	10,192,000	10,646,000
Selling, general, and administrative expenses	10,069,000	10,149,000
Gain (loss) on disposal of assets	0	4,000
Operating income	123,000	501,000
Other (income) expense:
Investment/interest income	(265,000)	(383,000)
Foreign exchange (gain) loss	106,000	(37,000)
Other, net	(30,000)	(23,000)
Total other income	(2,304,000)	(443,000)
Income from continuing operations before income taxes	2,427,000	944,000
Income tax provision	448,000	210,000
Income from continuing operations	1,979,000	734,000
Loss from discontinued operations, net of tax	(11,000)	(87,000)
Net income	1,968,000	647,000
Foreign currency translation gain, net of tax	425,000	400,000
Fair value adjustments on investments	1,000	1,000
Comprehensive income	2,394,000	1,048,000
Common Stock
Other (income) expense:
Net income
Foreign currency translation gain, net of tax
Fair value adjustments on investments
Net income per Class B common share-Basic:
Income from continuing operations	$ 0.14	$ 0.05
Income (loss) from discontinued operations	$ 0.00	$ (0.01)
Total net income per Class B common share-Basic:	$ 0.14	$ 0.04
Weighted average number of shares:
Common shares - Basic	12,127,000	12,772,000
Common shares - Diluted	14,688,000	15,787,000
Dividends per common share	$ 0.060	$ 0.060
Class B Common Stock
Net income per Class B common share-Basic:
Income from continuing operations	$ 0.13	$ 0.04
Income (loss) from discontinued operations	$ 0.00	$ 0.00
Total net income per Class B common share-Basic:	$ 0.13	$ 0.04
Net income per Common share - Diluted:
Income from continuing operations	$ 0.13	$ 0.04
Income (loss) from discontinued operations	$ 0.00	$ 0.00
Total net income per Common share - Diluted:	$ 0.13	$ 0.04
Weighted average number of shares:
Common shares - Basic	2,428,000	2,913,000
Common shares - Diluted	2,428,000	2,913,000
Dividends per common share	$ 0.054	$ 0.054
Anti-trust class action lawsuit settlement [Domain]
Other (income) expense:
Other, net	$ (2,115,000)