REPORTABLE SEGMENTS (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 142,458,279	$ 157,509,185	$ 142,856,049
Operating profit	10,386,321	13,551,423	8,712,180
Interest expense	(322,731)	(369,357)	(231,481)
Other income	50,305	42,452	26,230
Income before income taxes	10,113,895	13,224,518	8,506,929
Assets	113,858,409	115,854,150	106,699,974
Depreciation and amortization	3,825,286	3,439,800	3,707,216
Capital expenditures before currency translation adjustment	5,439,560	4,149,943	3,377,620
Currency translation adjustment	(245)	(2,730)	7,132
Total capital expenditures	5,523,742	4,216,970	3,394,726
United States [Member]
Segment Reporting Information [Line Items]
Revenues	114,085,322	120,604,363	107,472,590
Assets	96,289,200	95,441,029	86,844,921
Foreign [Member]
Segment Reporting Information [Line Items]
Revenues	28,372,957	36,904,822	35,383,459
Assets	17,569,209	20,413,121	19,855,053
Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Operating profit	4,797,254	7,566,512	4,912,341
Assets	31,820,269	34,425,594	32,298,527
Depreciation and amortization	2,085,618	1,769,097	1,768,975
Capital expenditures before currency translation adjustment	1,967,335	1,552,147	1,568,779
Security Products [Member]
Segment Reporting Information [Line Items]
Operating profit	2,780,403	4,113,661	3,408,187
Assets	43,582,088	41,857,156	42,149,711
Depreciation and amortization	592,555	628,652	984,879
Capital expenditures before currency translation adjustment	469,669	260,692	331,619
Metal Products [Member]
Segment Reporting Information [Line Items]
Operating profit	2,808,664	1,871,250	391,652
Assets	19,282,393	18,281,619	16,814,255
Depreciation and amortization	1,147,113	1,042,051	953,362
Capital expenditures before currency translation adjustment	3,002,556	2,337,104	1,477,222
Operating Segments [Member]
Segment Reporting Information [Line Items]
Assets	94,684,750	94,564,369	91,262,493
General corporate [Member]
Segment Reporting Information [Line Items]
Assets	19,173,659	21,289,781	15,437,481
Capital expenditures before currency translation adjustment	84,427	69,757	9,974
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	142,458,279	157,509,185	142,856,049
Operating Segments [Member] | Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Revenues	60,367,209	72,268,559	66,119,119
Operating Segments [Member] | Security Products [Member]
Segment Reporting Information [Line Items]
Revenues	48,751,688	50,138,121	47,972,152
Operating Segments [Member] | Metal Products [Member]
Segment Reporting Information [Line Items]
Revenues	33,339,382	35,102,505	28,764,778
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	2,943,464	3,185,578	3,208,348
Intersegment Eliminations [Member] | Industrial Hardware [Member]
Segment Reporting Information [Line Items]
Revenues	373,797	270,911	330,150
Intersegment Eliminations [Member] | Security Products [Member]
Segment Reporting Information [Line Items]
Revenues	2,558,127	2,914,667	2,751,060
Intersegment Eliminations [Member] | Metal Products [Member]
Segment Reporting Information [Line Items]
Revenues	$ 11,540	$ 0	$ 127,138
Sales Revenue [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of major customers	1	0	0
Threshold percentage of concentration risk (in hundredths)	10.00%	10.00%	10.00%
Threshold percentage of customer exceeded 10% of total revenue (in hundredths)	11.50%