Consolidated Statement Of Stockholders' Equity (USD $) In Thousands	Common Stock [Member]	Class B Common Stock [Member]	Par Value [Member] USD ($)	Additional Paid In Capital [Member] USD ($)	Common Stock In Treasury [Member] USD ($)	Retained Earnings [Member] Common Stock [Member] USD ($)	Retained Earnings [Member] Class B Common Stock [Member] USD ($)	Retained Earnings [Member] USD ($)	Accumulated Other Comprehensive Income [Member] USD ($)	Common Stock [Member] USD ($)	Class B Common Stock [Member] USD ($)	Total USD ($)
Balance at May. 28, 2011			$ 893	$ 112,179	$ (1,493)			$ 101,053	$ 11,541			$ 224,173
Balance, shares at May. 28, 2011	14,921	2,952
Net income								3,631				3,631
Foreign currency translation									1,368			1,368
Fair value adjustments on investments									(48)			(48)
Share-based compensation:
Stock options				155								155
Common stock:
Options exercised			2	164	(79)							87
Options exercised, shares	21
Repurchase of common stock					(7,691)							(7,691)
Treasury stock			(34)	(8,934)	8,972							4
Treasury stock, shares	(672)
Other				2	1			(1)				2
Dividends paid to :
Dividends paid to common stock						(713)	(133)			(713)	(133)
Balance at Sep. 03, 2011			$ 861	$ 103,566	$ (290)			$ 103,837	$ 12,861			$ 220,835
Balance, shares at Sep. 03, 2011	14,270	2,952