Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Cash Used in Operating Activities:
Net Income	$ 1,640	$ 1,538
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	1,309	1,348
Amortization	185	184
Amortization of deferred gain	(130)	(130)
Provision for bad debts	65	(27)
Stock-based compensation and directors' fees	380	587
Excess tax benefit from stock-based awards	(320)	(353)
Unrealized gain on short-term investments	(27)	(7)
Unrealized gain on foreign exchange contracts	(144)	(182)
Unrealized foreign currency transaction gain	(22)	(105)
Changes in operating assets and liabilities:
Accounts receivable	(1,922)	(2,972)
Inventories	(4,880)	(3,814)
Other assets	(886)	965
Accounts payable	(6,667)	466
Other liabilities	(1,511)	(4,911)
Net Cash Used in Operating Activities	(12,930)	(7,413)
Cash Used in Investing Activities:
Purchases of short-term investments	(77)	(8,185)
Sales of short-term investments	60	7,990
Additions to property, plant and equipment	(935)	(831)
Additions to trademarks and patents	(102)	(47)
Net Cash Used in Investing Activities	(1,054)	(1,073)
Cash Used in Financing Activities:
Repayment of long-term debt		(3,000)
Excess tax benefit from stock-based awards	320	353
Proceeds from sale of Class A common stock, net	(126)	232
Purchase of treasury stock	(493)	(612)
Net Cash Used in Financing Activities	(299)	(3,027)
Effect of exchange rate changes on cash and cash equivalents	(207)	339
Decrease in Cash and Cash Equivalents	(14,490)	(11,174)
Cash and cash equivalents at beginning of period	27,120	25,991
Cash and Cash Equivalents at End of Period	12,630	14,817
SUPPLEMENTAL INFORMATION
Income taxes paid, net	431	466
Interest paid	$ 122	$ 144