Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Cash (Used in) Provided by Operating Activities:
Net Income	$ 4,730	$ 5,199
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	2,584	2,655
Amortization	369	370
Amortization of deferred gain	(261)	(261)
Provision for bad debts	125	(253)
Stock-based compensation and directors' fees	1,073	727
Excess tax benefit from stock-based awards	(677)	(596)
Unrealized gain on short-term investments	(18)	(1)
Unrealized (gain) loss on foreign exchange contracts	(8)	106
Unrealized foreign currency transaction gain	(116)	(47)
Changes in operating assets and liabilities:
Accounts receivable	(1,403)	(2,737)
Inventories	(8,626)	(3,807)
Other assets	(748)	460
Accounts payable	(4,722)	2,300
Other liabilities	2,719	(1,941)
Net Cash (Used in) Provided By Operating Activities	(4,979)	2,174
Cash Used in Investing Activities:
Purchases of short-term investments	(128)	(12,678)
Sales of short-term investments	111	12,580
Additions to property, plant and equipment	(2,171)	(1,844)
Additions to trademarks and patents	(166)	(166)
Net Cash Used in Investing Activities	(2,354)	(2,108)
Cash Used in Financing Activities:
Borrowing on long-term debt		3,000
Repayment of long-term debt		(6,000)
Excess tax benefit from stock-based awards	677	597
Proceeds from sale of Class A common stock, net	(358)	317
Purchase of treasury stock	(941)	(1,502)
Net Cash Used in Financing Activities	(622)	(3,588)
Effect of exchange rate changes on cash and cash equivalents	(115)	146
Decrease in Cash and Cash Equivalents	(8,070)	(3,376)
Cash and cash equivalents at beginning of period	27,120	25,991
Cash and Cash Equivalents at End of Period	19,050	22,615
SUPPLEMENTAL INFORMATION
Income taxes paid, net	952	630
Interest paid	$ 235	$ 237