INCOME TAXES (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Components of Deferred Tax Assets and Liabilities [Abstract]
Property, plant and equipment	$ 6,184,873	$ 5,942,048	$ 5,480,102
Other	208,938	0	0
Total deferred income tax liabilities	6,393,811	5,942,048	5,480,102
Other postretirement benefits	(787,087)	(885,729)	(653,238)
Inventories	(848,364)	(761,613)	(1,005,134)
Allowance for doubtful accounts	(104,695)	(104,903)	(94,120)
Intangible assets	(373,482)	(422,443)	(472,243)
Accrued compensation	(158,866)	(197,582)	(224,155)
Pensions	(3,828,224)	(7,128,057)	(5,573,596)
Other	0	(116,826)	(160,876)
Total deferred income tax assets	(6,100,718)	(9,617,153)	(8,183,362)
Net deferred income tax (assets) liabilities	293,093	(3,675,105)	(2,703,260)
Income before income taxes [Abstract]
Domestic	7,139,039	8,614,664	5,180,467
Foreign	2,974,856	4,609,854	3,326,462
Income before income taxes	10,113,895	13,224,518	8,506,929
Current:
Federal	1,942,271	1,909,172	214,988
Foreign	871,949	1,367,025	830,028
State	162,952	220,820	109,711
Deferred:
Federal	241,821	1,022,660	1,747,620
Foreign	0	0	0
State	(7,019)	79,041	99,652
Provision for income taxes	3,211,974	4,598,718	3,001,999
Reconciliation of income taxes computed using U.S. federal statutory rate to that reflected in operations [Abstract]
Income taxes using U.S. federal statutory rate	3,438,724	4,496,336	2,892,356
State income taxes, net of federal benefit	99,245	188,490	133,201
Impact of foreign subsidiaries on effective tax rate	(103,878)	136,590	21,329
Impact of manufacturers deduction on effective tax rate	(138,127)	(232,928)	(50,537)
Other-net	(83,990)	10,230	5,650
Provision for income taxes	3,211,974	4,598,718	3,001,999
Income taxes using U.S. federal statutory rate (in hundredths)	34.00%	34.00%	34.00%
State income taxes, net of federal benefit (in hundredths)	1.00%	2.00%	2.00%
Impact of foreign subsidiaries on effective tax rate (in hundredths)	(1.00%)	1.00%	0.00%
Impact of manufacturers deduction on effective tax rate (in hundredths)	(1.00%)	(2.00%)	(1.00%)
Other-net (in hundredths)	(1.00%)	0.00%	0.00%
Effective income tax rate (in hundredths)	32.00%	35.00%	35.00%
Total income taxes paid	2,568,708	3,350,283	1,631,299
Undistributed earnings of foreign subsidiaries	13,791,838
Tax benefit from exercise of non-qualified stock options and disqualifying dispositions of incentive stock options	0	0	106,471
Reconciliation of the beginning and ending amount of unrecognized tax benefits [Roll Forward]
Balance at beginning of year	499,624	486,332	495,843
Increases for positions taken during the current period	49,636	119,893	25,398
Decreases relating to settlements	(263,856)	0	0
Decreases resulting from the expiration of the statute of limitations	(65,115)	(106,601)	(34,909)
Balance at end of year	220,289	499,624	486,332
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would affect the annual effective tax rate	145,391
Accrued interest related to unrecognized tax benefits	$ 28,000
U.S. federal [Member]
Income Tax Contingency [Line Items]
Open tax year	2010
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Open tax year	2010
Foreign Jurisdiction [Member]
Income Tax Contingency [Line Items]
Open tax year	2007