REPORTABLE SEGMENTS (Details) - USD ($)	12 Months Ended
Jan. 02, 2021	Dec. 28, 2019
Sales	$ 240,403,114	$ 251,742,619
Income before income taxes	6,025,612	16,205,971
Operating profit	7,000,254	17,457,854
Interest expense	(2,744,800)	(1,857,961)
Other income	1,770,158	606,078
Reportable Geographical Components [Member] \| United States [Member]
Sales	225,835,894	230,920,619
Assets	253,689,704	263,295,787
Reportable Geographical Components [Member] \| Foreign [Member]
Sales	14,567,220	20,822,000
Assets	21,838,650	17,367,189
General Corporate [Member]
Assets	143,514,006	140,410,549
Capital expenditures	2,986	0
Operating Segments [Member]
Assets	132,014,348	140,252,427
Engineered Solutions [Member] \| Operating Segment [Member]
Sales	197,614,590	186,795,507
Income before income taxes	14,589,675	16,512,736
Inter-segment sales	675,389	1,286,384
Assets	95,140,639	91,032,813
Depreciation and amortization	6,795,435	4,495,380
Capital expenditures before currency translation adjustment	2,340,762	4,025,649
Diversified Products [Member] \| Operating Segment [Member]
Sales	42,788,524	64,947,112
Income before income taxes	(7,589,421)	945,118
Inter-segment sales	25,559	43,451
Assets	36,873,709	49,219,614
Depreciation and amortization	1,682,077	1,959,501
Capital expenditures before currency translation adjustment	763,674	1,411,509
Reporting Segment Information [Member]
Sales	240,403,114	251,742,619
Income before income taxes	6,025,612	16,205,971
Operating profit	7,000,254	17,457,854
Interest expense	(2,744,800)	(1,857,961)
Other income	1,770,158	606,078
Inter-segment sales	700,948	1,329,835
Net sales	240,403,114	251,742,619
Assets	275,528,354	280,662,976
Depreciation and amortization	8,477,512	6,454,881
Capital expenditures before currency translation adjustment	3,104,436	5,437,158
Currency translation adjustment	(8,439)	3,330
Capital expenditures	$ 3,098,983	$ 5,440,488

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount of the cost of borrowed funds accounted for as interest expense.

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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