CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Operating Activities
Net income	$ 4,978,325	$ 6,901,929
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,916,310	2,550,290
Loss on sale of equipment and other assets	28,065	17,713
Provision for doubtful accounts	76,201	94,315
Deferred income taxes	(1,959)	18
Issuance of Common Stock for directors' fees	16,872	18,451
Changes in operating assets and liabilities:
Accounts receivable	(499,335)	(923,685)
Inventories	(1,092,971)	1,058,395
Prepaid expenses and other	201,459	94,487
Prepaid pension cost	1,842,832	(555,684)
Recoverable taxes receivable	1,158,632	647,949
Other assets	(59,685)	(86,365)
Accounts payable	655,352	(243,280)
Accrued compensation	(960,059)	62,476
Other accrued expenses	(1,366,903)	1,132,760
Net cash provided by operating activities	7,893,136	10,769,769
Investing Activities
Purchases of property, plant and equipment	(4,160,251)	(3,549,674)
Proceeds from sales of equipment and other assets	0	19,000
Net cash used in investing activities	(4,160,251)	(3,530,674)
Financing Activities
Principal payments on long-term debt	(1,071,429)	(892,857)
Principal payments on revolving credit loan	0	(3,000,000)
Proceeds from issuance of long-term debt	0	5,000,000
Proceeds from sales of Common Stock	13,580	61,110
Dividends paid	(1,928,439)	(1,864,709)
Net cash used in financing activities	(2,986,288)	(696,456)
Effect of exchange rate changes on cash	(147,996)	133,409
Net change in cash and cash equivalents	598,601	6,676,048
Cash and cash equivalents at beginning of period	18,482,144	11,147,297
Cash and cash equivalents at end of period	$ 19,080,745	$ 17,823,345