CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Operating Activities
Net income	$ 3,179,542	$ 4,677,954
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Depreciation and amortization	1,948,878	1,710,686
Loss on sale of equipment and other assets	11,394	17,756
Provision for doubtful accounts	40,410	65,159
Issuance of Common Stock for directors' fees	11,253	12,298
Changes in operating assets and liabilities:
Accounts receivable	(1,301,746)	(1,811,994)
Inventories	(387,175)	268,835
Prepaid expenses and other	(224,680)	411,292
Prepaid pension cost	1,327,949	(517,902)
Recoverable taxes receivable	750,000	647,949
Other assets	(51,997)	(34,196)
Accounts payable	454,402	(228,004)
Accrued compensation	(1,397,640)	(395,312)
Other accrued expenses	165,827	570,077
Net cash provided by operating activities	4,526,417	5,394,598
Investing Activities
Purchases of property, plant and equipment	(2,714,190)	(2,371,770)
Proceeds from sales of equipment and other assets	0	19,000
Net cash used in investing activities	(2,714,190)	(2,352,770)
Financing Activities
Principal payments on long-term debt	(714,286)	(535,714)
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	(1,244,076)	(1,242,807)
Net cash (used in) provided by financing activities	(1,944,782)	282,589
Effect of exchange rate changes on cash	(182,601)	12,785
Net change in cash and cash equivalents	(315,156)	3,337,202
Cash and cash equivalents at beginning of period	18,482,144	11,147,297
Cash and cash equivalents at end of period	$ 18,166,988	$ 14,484,499