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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% |  |

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