Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
	Nov. 29, 2014	Nov. 30, 2013	Nov. 29, 2014	Nov. 30, 2013
Net Sales	$ 33,841,000	$ 35,436,000	$ 68,540,000	$ 69,693,000
Cost of Sales	23,379,000	24,429,000	47,420,000	48,494,000
Gross profit	10,462,000	11,007,000	21,120,000	21,199,000
Selling, general, and administrative expenses	12,621,000	10,473,000	23,803,000	20,542,000
Loss on disposal of assets	0	0	9,000	0
Operating income (loss)	(2,159,000)	534,000	(2,692,000)	657,000
Other (income) expense:
Investment/interest income	(249,000)	(255,000)	(505,000)	(520,000)
Foreign exchange (gain) loss	47,000	(14,000)	(10,000)	92,000
Other, net	(14,000)	15,000	(16,000)	(15,000)
Total other income	(216,000)	(254,000)	(531,000)	(2,558,000)
Income (loss) from continuing operations before income taxes	(1,943,000)	788,000	(2,161,000)	3,215,000
Income tax provision (benefit)	(799,000)	157,000	(934,000)	605,000
Income (loss) from continuing operations	(1,144,000)	631,000	(1,227,000)	2,610,000
Income (loss) from discontinued operations, net of tax	87,000	(107,000)	87,000	(118,000)
Net income (loss)	(1,057,000)	524,000	(1,140,000)	2,492,000
Foreign currency translation gain (loss), net of tax	(2,993,000)	1,196,000	(3,961,000)	1,621,000
Fair value adjustments on investments	0	22,000	25,000	23,000
Comprehensive income (loss)	(4,050,000)	1,742,000	(5,076,000)	4,136,000
Common Stock
Other (income) expense:
Net income (loss)
Foreign currency translation gain (loss), net of tax
Fair value adjustments on investments
Net income per common share-Basic:
Income from continuing operations	$ (0.08)	$ 0.05	$ (0.09)	$ 0.19
Income (loss) from discontinued operations	$ 0.01	$ (0.01)	$ 0.01	$ (0.01)
Total net income per common share-Basic:	$ (0.07)	$ 0.04	$ (0.08)	$ 0.18
Net income per Common share - Diluted:
Income from continuing operations	$ (0.08)	$ 0.04	$ (0.09)	$ 0.18
Income (loss) from discontinued operations	$ 0.01	$ (0.01)	$ 0.01	$ (0.01)
Total net income per Common share - Diluted:	$ (0.07)	$ 0.03	$ (0.08)	$ 0.17
Weighted average number of shares:
Common shares - Basic	11,770,000	11,871,000	11,797,000	11,997,000
Common shares - Diluted	11,770,000	14,185,000	11,797,000	14,433,000
Dividends per common share	$ 0.060	$ 0.060	$ 0.120	$ 0.120
Class B Common Stock
Net income per common share-Basic:
Income from continuing operations	$ (0.07)	$ 0.04	$ (0.08)	$ 0.17
Income (loss) from discontinued operations	$ 0.01	$ (0.01)	$ 0.01	$ (0.01)
Total net income per common share-Basic:	$ (0.06)	$ 0.03	$ (0.07)	$ 0.16
Net income per Common share - Diluted:
Income from continuing operations	$ (0.07)	$ 0.04	$ (0.08)	$ 0.17
Income (loss) from discontinued operations	$ 0.01	$ (0.01)	$ 0.01	$ (0.01)
Total net income per Common share - Diluted:	$ (0.06)	$ 0.03	$ (0.07)	$ 0.16
Weighted average number of shares:
Common shares - Basic	2,141,000	2,191,000	2,161,000	2,309,000
Common shares - Diluted	2,141,000	2,191,000	2,161,000	2,309,000
Dividends per common share	$ 0.054	$ 0.054	$ 0.108	$ 0.108
Anti-trust class action lawsuit settlement [Domain]
Other (income) expense:
Other, net	$ 0	$ 0	$ 0	$ (2,115,000)