Unaudited Consolidated Statements of Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 25, 2017	Feb. 27, 2016	Feb. 25, 2017	Feb. 27, 2016
Net sales	$ 32,313	$ 31,291	$ 99,513	$ 102,448
Cost of sales	21,621	21,541	67,617	71,001
Gross profit	10,692	9,750	31,896	31,447
Selling, general, and administrative expenses	12,002	12,471	37,697	37,938
Gain on disposal of assets				(244)
Operating loss	(1,310)	(2,721)	(5,801)	(6,247)
Other (income) expense:
Investment/interest income	(67)	(131)	(129)	(433)
Foreign exchange loss	(214)	(265)	(311)	(108)
Other, net	(16)	(40)		(53)
Total other expense	131	94	182	(378)
Loss before income taxes	(1,441)	(2,815)	(5,983)	(5,869)
Income tax provision (benefit)	(10)	111	820	742
Net loss	(1,431)	(2,926)	(6,803)	(6,611)
Foreign currency translation gain (loss), net of tax	508	240	(1,736)	(1,912)
Fair value adjustments on investments gain (loss)	27	(47)	40	(79)
Comprehensive loss	$ (896)	$ (2,733)	$ (8,499)	$ (8,602)
Weighted average number of shares:
Common shares - Diluted	12,847	12,842	12,845	13,117
Common Stock [Member]
Loss per share:
Loss per share - Basic:	$ (0.11)	$ (0.23)	$ (0.54)	$ (0.51)
Loss per share - Diluted	$ (0.11)	$ (0.23)	$ (0.54)	$ (0.51)
Weighted average number of shares:
Common shares - Basic	10,706	10,701	10,704	10,976
Common shares - Diluted	10,706	10,701	10,704	10,976
Dividends per common share	$ 0.060	$ 0.060	$ 0.180	$ 0.180
Common Class B [Member]
Loss per share:
Loss per share - Basic:	(0.10)	(0.21)	(0.48)	(0.46)
Loss per share - Diluted	$ (0.10)	$ (0.21)	$ (0.48)	$ (0.46)
Weighted average number of shares:
Common shares - Basic	2,141	2,141	2,141	2,141
Common shares - Diluted	2,141	2,141	2,141	2,141
Dividends per common share	$ 0.054	$ 0.054	$ 0.162	$ 0.162