Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Operating Activities
Net income	$ 6,901,921	$ 8,625,800	$ 5,504,930
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,825,286	3,439,800	3,707,216
(Gain)/loss on sale of equipment and other assets	116,327	(1,500)	(1,602)
Provision for doubtful accounts	106,485	147,313	44,502
Deferred income taxes	531,023	1,101,701	1,847,272
Issuance of Common Stock for directors' fees	22,504	24,609	24,600
Changes in operating assets and liabilities:
Accounts receivable	1,776,744	307,524	(2,470,834)
Inventories	(1,400,893)	586,576	(1,825,171)
Prepaid expenses and other	308,653	(24,741)	10,870
Prepaid pension cost	(111,945)	(865,831)	(4,924,402)
Recoverable taxes receivable	1,158,632	(510,683)	(647,949)
Other assets	(76,426)	(124,598)	(81,750)
Accounts payable	(253,994)	(889,663)	960,205
Accrued compensation	(626,385)	439,537	14,802
Other accrued expenses	(960,896)	1,389,988	(716,233)
Net cash provided by operating activities	11,317,036	13,645,832	1,446,456
Investing Activities
Purchases of property, plant and equipment	(5,523,742)	(4,216,970)	(3,394,726)
Proceeds from sale of equipment and other assets	2,839	44,184	4,000
Net cash used in investing activities	(5,520,903)	(4,172,786)	(3,390,726)
Financing Activities
Principal payments on long-term debt	(1,428,571)	(1,250,000)	(714,286)
Proceeds from issuance of long-term debt	0	5,000,000	0
Principal payments on revolving credit loan	0	(3,000,000)
Proceeds from revolving credit loan	0	0	3,000,000
Proceeds from sales of Common Stock	13,580	61,110	651,390
Tax benefit from disqualifying disposition of incentive stock options and exercise of non-qualified stock options	0	0	106,471
Dividends paid	(2,612,839)	(3,108,577)	(2,224,187)
Net cash (used in) provided by financing activities	(4,027,830)	(2,297,467)	819,388
Effect of exchange rate changes on cash	(262,086)	159,268	47,571
Net change in cash and cash equivalents	1,506,217	7,334,847	(1,077,311)
Cash and cash equivalents at beginning of year	18,482,144	11,147,297	12,224,608
Cash and cash equivalents at end of year	$ 19,988,361	$ 18,482,144	$ 11,147,297