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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 income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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

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The net result for the period of deducting operating expenses from operating revenues.

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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REPORTABLE SEGMENTS (Details) - USD ($)	3 Months Ended								12 Months Ended
REPORTABLE SEGMENTS (Details) - USD ($)	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Segment Reporting Information [Line Items]
Sales	$ 54,143,638	$ 56,007,937	$ 58,044,743	$ 36,043,295	$ 34,144,942	$ 33,478,347	$ 36,883,312	$ 33,101,657	$ 204,239,613	$ 137,608,258	$ 144,567,951
Operating profit									12,276,701	11,135,872	8,027,728
Interest expense									(976,512)	(121,500)	(185,475)
Other income									154,753	209,043	178,722
Income before income taxes									11,454,942	11,223,415	8,020,975
Assets	176,458,397				124,198,396				176,458,397	124,198,396	121,738,559
Depreciation and amortization									4,719,185	3,814,393	3,921,438
Capital expenditures before currency translation adjustment									2,756,709	2,820,759	2,500,377
Currency translation adjustment									6,240	(8,889)	25,020
Capital expenditures									2,762,949	2,863,470	2,538,236
Operating Segments [Member]
Segment Reporting Information [Line Items]
Assets	116,679,690				100,246,515				116,679,690	100,246,515	104,045,708
Operating Segments [Member] \| Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Sales									115,273,233	61,058,871	61,338,812
Operating profit									5,126,128	5,683,730	4,314,149
Assets	44,828,458				32,278,281				44,828,458	32,278,281	30,425,348
Depreciation and amortization									2,526,460	1,468,904	1,580,741
Capital expenditures before currency translation adjustment									1,151,868	648,516	1,479,984
Operating Segments [Member] \| Security Products [Member]
Segment Reporting Information [Line Items]
Sales									60,976,998	57,255,101	56,598,487
Operating profit									6,099,777	5,677,264	3,798,115
Assets	53,724,837				49,520,708				53,724,837	49,520,708	52,688,497
Depreciation and amortization									964,873	980,048	1,010,262
Capital expenditures before currency translation adjustment									705,178	1,018,371	388,377
Operating Segments [Member] \| Metal Products [Member]
Segment Reporting Information [Line Items]
Sales									27,989,382	19,294,286	26,630,652
Operating profit									1,050,796	(225,122)	(84,536)
Assets	18,126,395				18,447,526				18,126,395	18,447,526	20,931,863
Depreciation and amortization									1,227,852	1,365,441	1,330,435
Capital expenditures before currency translation adjustment									899,663	1,153,872	632,016
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales									3,481,764	3,354,207	3,425,976
Intersegment Eliminations [Member] \| Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Sales									524,536	637,405	595,596
Intersegment Eliminations [Member] \| Security Products [Member]
Segment Reporting Information [Line Items]
Sales									2,935,797	2,716,802	2,813,576
Intersegment Eliminations [Member] \| Metal Products [Member]
Segment Reporting Information [Line Items]
Sales									21,431	0	16,804
General Corporate [Member]
Segment Reporting Information [Line Items]
Assets	59,778,707				23,951,881				59,778,707	23,951,881	17,692,851
Capital expenditures									0	51,600	12,839
Reportable Geographical Components [Member] \| United States [Member]
Segment Reporting Information [Line Items]
Sales									178,124,818	117,679,860	126,115,036
Assets	153,712,643				107,031,435				153,712,643	107,031,435	106,662,743
Reportable Geographical Components [Member] \| Foreign [Member]
Segment Reporting Information [Line Items]
Sales									26,114,795	19,928,398	18,452,915
Assets	$ 22,745,754				$ 17,166,961				$ 22,745,754	$ 17,166,961	$ 15,075,816