REPORTABLE SEGMENTS (Details)	3 Months Ended								12 Months Ended
	Jan. 02, 2016 USD ($)	Oct. 03, 2015 USD ($)	Jul. 04, 2015 USD ($)	Apr. 04, 2015 USD ($)	Jan. 03, 2015 USD ($)	Sep. 27, 2014 USD ($)	Jun. 28, 2014 USD ($)	Mar. 29, 2014 USD ($)	Jan. 02, 2016 USD ($)	Jan. 03, 2015 USD ($) Customer	Dec. 28, 2013 USD ($) Customer
Segment Reporting Information [Line Items]
Sales	$ 34,413,912	$ 36,239,500	$ 37,037,697	$ 36,876,842	$ 34,393,056	$ 35,803,405	$ 34,779,773	$ 35,849,126	$ 144,567,951	$ 140,825,360	$ 142,458,279
Operating Profit									8,027,728	11,718,648	10,386,321
Interest expense									(185,475)	(254,576)	(322,731)
Other income									178,722	64,691	50,305
Income before income taxes									8,020,975	11,528,763	10,113,895
Assets	121,738,559				121,270,556				121,738,559	121,270,556
Depreciation and amortization									3,921,438	3,486,302	3,825,286
Capital expenditures before currency translation adjustment									2,500,377	3,567,238	5,439,560
Currency translation adjustment									25,020	10,347	(245)
Total capital expenditures									2,538,236	3,633,165	5,523,742
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Profit									8,027,728	11,718,648	10,386,321
Assets	104,045,708				102,271,004				104,045,708	102,271,004	94,684,750
Operating Segments [Member] | Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Sales									61,338,812	58,666,229	60,367,209
Operating Profit									4,314,149	5,063,786	4,797,254
Assets	30,425,348				29,660,695				30,425,348	29,660,695	31,820,269
Depreciation and amortization									1,580,741	1,631,521	2,085,618
Capital expenditures before currency translation adjustment									1,479,984	1,929,022	1,967,335
Operating Segments [Member] | Security Products [Member]
Segment Reporting Information [Line Items]
Sales									56,598,487	49,381,553	48,751,688
Operating Profit									3,798,115	4,058,554	2,780,403
Assets	52,688,497				51,573,251				52,688,497	51,573,251	43,582,088
Depreciation and amortization									1,010,262	621,501	592,555
Capital expenditures before currency translation adjustment									388,377	973,365	469,669
Operating Segments [Member] | Metal Products [Member]
Segment Reporting Information [Line Items]
Sales									26,630,652	32,777,578	33,339,382
Operating Profit									(84,536)	2,596,308	2,808,664
Assets	20,931,863				21,037,058				20,931,863	21,037,058	19,282,393
Depreciation and amortization									1,330,435	1,233,280	1,147,113
Capital expenditures before currency translation adjustment									632,016	664,851	3,002,556
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Sales									3,425,976	3,549,925	2,943,464
Intersegment Eliminations [Member] | Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Sales									595,596	984,192	373,797
Intersegment Eliminations [Member] | Security Products [Member]
Segment Reporting Information [Line Items]
Sales									2,813,576	2,565,733	2,558,127
Intersegment Eliminations [Member] | Metal Products [Member]
Segment Reporting Information [Line Items]
Sales									16,804	0	11,540
General Corporate [Member]
Segment Reporting Information [Line Items]
Assets	17,692,851				18,999,552				17,692,851	18,999,552	19,173,659
Total capital expenditures									12,839	55,580	84,427
Reportable Geographical Components [Member]
Segment Reporting Information [Line Items]
Sales									144,567,951	140,825,360	142,458,279
Assets	121,738,559				121,270,556				121,738,559	121,270,556	113,858,409
Reportable Geographical Components [Member] | United States [Member]
Segment Reporting Information [Line Items]
Sales									126,115,036	117,478,557	114,085,322
Assets	106,662,743				105,771,961				106,662,743	105,771,961	96,289,200
Reportable Geographical Components [Member] | Foreign [Member]
Segment Reporting Information [Line Items]
Sales									18,452,915	23,346,803	28,372,957
Assets	$ 15,075,816				$ 15,498,595				$ 15,075,816	$ 15,498,595	$ 17,569,209
Sales Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers | Customer										1	1
Sales Revenue [Member] | Customer Concentration Risk [Member] | Metal Products [Member]
Concentration Risk [Line Items]
Threshold percentage of customer exceeded 10% of total revenue										10.50%	11.50%