Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 29, 2013	Dec. 29, 2012
Current Assets
Cash and cash equivalents	$ 19,050	$ 27,120
Short-term investments	262	227
Accounts receivable, gross	33,956	33,510
Allowance for doubtful accounts	(602)	(633)
Accounts receivable, net	33,354	32,877
Inventories	46,023	38,020
Deferred income taxes	3,410	3,417
Other current assets	8,576	8,072
Total Current Assets	110,675	109,733
Property, plant and equipment, gross	114,596	112,901
Accumulated depreciation	(100,677)	(98,525)
Property, Plant and Equipment, Net	13,919	14,376
Goodwill	15,279	15,279
Intangibles, Net	8,403	8,606
Deferred Income Taxes	10,089	11,570
Other Assets	1,799	1,775
Total Assets	160,164	161,339
Current Liabilities
Accounts payable, accrued expenses and other liabilities	20,867	26,399
Line of credit	15,000	15,000
Accrued compensation and related taxes	7,604	8,132
Retirement plan obligations	2,343	2,731
Income taxes payable	823	567
Total Current Liabilities	46,637	52,829
Retirement Plan Obligations	18,890	19,808
Deferred Gain on Sale of Real Estate	1,434	1,695
Other Long-Term Liabilities	751	662
Accrued Warranty Costs	1,283	1,267
Commitments and Contingencies (Note L)
Total Liabilities	68,995	76,261
Shareholders' Equity
Additional paid-in capital	33,741	32,309
Retained earnings	105,396	100,666
Accumulated other comprehensive loss	(18,940)	(19,852)
Treasury stock, at cost	(50,363)	(49,027)
Total Shareholders' Equity	91,169	85,078
Total Liabilities and Shareholders' Equity	160,164	161,339
Class A [Member]
Shareholders' Equity
Common stock	19,530	19,177
Class B [Member]
Shareholders' Equity
Common stock	$ 1,805	$ 1,805