Unaudited Consolidated Statement of Stockholders' Equity - 9 months ended Feb. 25, 2017 - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Common Class B [Member]	Par value [Member]	Additional Paid-In Capital [Member]	Common Stock in Treasury [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Total
Beginning Balance at May. 28, 2016			$ 642	$ 58,969		$ 79,292	$ 2,772	$ 141,675
Beginning Balance (in shares) at May. 28, 2016	10,703	2,141
Comprehensive loss
Net loss						(6,803)		(6,803)
Foreign currency translation							(1,736)	(1,736)
Fair value adjustments on investments							40	40
Share-based compensation:
Stock options				354				354
Common stock:
Options exercised				30				30
Options exercised, shares	5
Dividends paid to:
Common						(1,925)		(1,925)
Class B						(348)		(348)
Ending Balance at Feb. 25, 2017			$ 642	$ 59,353		$ 70,216	$ 1,076	$ 131,287
Ending Balance (in shares) at Feb. 25, 2017	10,708	2,141