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INCOME TAXES (Details) - USD ($)
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Components of Deferred Tax Assets and Liabilities [Abstract]        
Property, plant and equipment   $ 3,853,837 $ 6,515,129 $ 6,694,885
Intangible assets   2,620,791 0 0
Other   64,905 119,618 99,989
Foreign Withholding Tax   861,964 0 0
Total deferred income tax liabilities   7,401,497 6,634,747 6,794,874
Other postretirement benefits   (235,510) (371,460) (281,154)
Inventories   (792,724) (806,680) (807,061)
Allowance for doubtful accounts   (97,570) (124,329) (124,351)
Intangible assets   0 (224,609) (299,137)
Accrued compensation   (83,829) (233,806) (252,297)
Pensions   (6,029,034) (9,406,224) (8,616,582)
Foreign Tax Credit   (449,578) 0 0
Total deferred income tax assets   (7,688,245) (11,167,108) (10,380,582)
Net deferred income tax (assets) liabilities   (286,748) (4,532,361) (3,585,708)
Income before income taxes [Abstract]        
Domestic   7,513,348 7,276,239 4,308,809
Foreign   3,941,594 3,947,176 3,712,166
Income before income taxes   11,454,942 11,223,415 8,020,975
Current [Abstract]        
Federal   3,713,975 2,554,341 1,337,417
Foreign   1,084,353 1,091,952 1,054,694
State   319,439 194,514 140,139
Deferred [Abstract]        
Federal   (47,241) (339,412) (223,530)
Foreign   1,301,972 0 0
State   37,189 (63,303) (14,788)
Provision for income taxes   6,409,687 3,438,092 2,293,932
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, Amount   3,894,680 3,815,962 2,727,131
State income taxes, net of federal benefit, Amount   264,205 87,061 82,987
Impact on Foreign Repatriation Tax Reform, Amount   2,034,065 0 0
Impact of foreign subsidiaries on effective tax rate, Amount   (364,569) (365,528) (388,132)
Impact on New Tax Law, Amount   531,307 0 0
Impact of manufacturers deduction on effective tax rate, Amount   (123,554) (140,690) (91,018)
Other-net, Amount   173,553 41,287 (37,036)
Provision for income taxes   $ 6,409,687 $ 3,438,092 $ 2,293,932
Income taxes using U.S. federal statutory rate, Percent   34.00% 34.00% 34.00%
State income taxes, net of federal benefit, Percent   2.00% 1.00% 1.00%
Impact on Foreign Repatriation Tax Reform, percent   18.00% 0.00% 0.00%
Impact of foreign subsidiaries on effective tax rate, Percent   (3.00%) (3.00%) (5.00%)
Impact on New Tax Law, percent   5.00% 0.00% 0.00%
Impact of manufacturers deduction on effective tax rate, Percent   (1.00%) (1.00%) (1.00%)
Other-net, Percent   1.00% 0.00% 0.00%
Effective income tax rate   56.00% 31.00% 29.00%
Total income taxes paid   $ 4,104,701 $ 3,493,558 $ 2,348,865
Effect of tax cuts and jobs act of 2017 [Abstract]        
Income tax expense   531,307    
Undistributed earnings of foreign subsidiaries   17,153,163    
Deemed repatriation of earnings held in foreign corporations   $ 1,172,101    
Period of installments for payments of taxes   8 years    
2018   $ 93,768    
2019   93,768    
2020   93,768    
2021   93,768    
2022   93,768    
2023   175,815    
2024   234,420    
2025   293,026    
Reconciliation of the beginning and ending amount of unrecognized tax benefits [Roll Forward]        
Balance at beginning of year $ 299,734 251,839 249,782 248,645
Increases for positions taken during the current period   53,013 44,172 27,947
Decreases resulting from the expiration of the statute of limitations   (5,118) (42,115) (26,810)
Balance at end of year   299,734 $ 251,839 $ 249,782
Income Tax Contingency [Line Items]        
Unrecognized tax benefits that would affect the annual effective tax rate   236,789    
Accrued interest related to unrecognized tax benefits   $ 59,316    
Maximum [Member]        
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, Percent   35.00%    
Plan [Member]        
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, Percent 21.00%      
U.S. Federal [Member]        
Income Tax Contingency [Line Items]        
Open tax year   2013    
State and Local Jurisdiction [Member]        
Income Tax Contingency [Line Items]        
Open tax year   2013    
Foreign Jurisdiction [Member]        
Income Tax Contingency [Line Items]        
Open tax year   2011