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ACCOUNTING POLICIES (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 28, 2013 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Dec. 29, 2012 | Sep. 29, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011
Cash Equivalents and Concentrations of Credit Risk [Abstract] |  |  |  |  |  |  |  |  |  |  |
Amount of deposits insured by Federal Deposit Insurance Corporation (FDIC) | $ 250,000 |  |  |  |  |  |  |  | $ 250,000 |  |
Inventory [Abstract] |  |  |  |  |  |  |  |  |  |  |
LIFO inventory amount | 23,922,496 |  |  |  |  |  |  |  | 23,922,496 |  |
FIFO inventory amount | 6,735,116 |  |  |  |  |  |  |  | 6,735,116 |  |
Excess of current cost over LIFO carrying value | 6,689,000 |  |  |  | 6,302,000 |  |  |  | 6,689,000 | 6,302,000 |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  |  |  |  |  | 3,592,263 | 3,210,324 | 3,155,717
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amortization expense |  |  |  |  |  |  |  |  | 233,023 | 229,476 | 551,499
Amortization expense fiscal year maturity [Abstract] |  |  |  |  |  |  |  |  |  |  |
2014 | 231,000 |  |  |  |  |  |  |  | 231,000 |  |
2015 | 231,000 |  |  |  |  |  |  |  | 231,000 |  |
2016 | 231,000 |  |  |  |  |  |  |  | 231,000 |  |
2017 | 231,000 |  |  |  |  |  |  |  | 231,000 |  |
2018 | 231,000 |  |  |  |  |  |  |  | 231,000 |  |
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Gross Amount | 3,637,181 |  |  |  | 3,759,555 |  |  |  | 3,637,181 | 3,759,555 |
Accumulated Amortization | 2,179,678 |  |  |  | 2,105,598 |  |  |  | 2,179,678 | 2,105,598 |
Net per Balance Sheet | 1,457,503 |  |  |  | 1,653,957 |  |  |  | 1,457,503 | 1,653,957 |
Weighted-Average Amortization Period |  |  |  |  |  |  |  |  | 16 years | 15 years 9 months 18 days |
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 13,933,599 |  |  |  | 13,905,209 | 13,933,599 | 13,905,209 |
Foreign exchange |  |  |  |  |  |  |  |  | (91,552) | 28,390 |
Ending balance | 13,842,047 |  |  |  | 13,933,599 |  |  |  | 13,842,047 | 13,933,599 | 13,905,209
Product development costs [Abstract] |  |  |  |  |  |  |  |  |  |  |
Product development costs |  |  |  |  |  |  |  |  | 991,286 | 814,096 | 825,778
Advertising costs [Abstract] |  |  |  |  |  |  |  |  |  |  |
Advertising costs |  |  |  |  |  |  |  |  | 486,027 | 442,300 | 386,908
Basic [Abstract] |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding (in shares) | 6,221,851 | 6,221,515 | 6,220,569 | 6,219,775 | 6,219,384 | 6,219,241 | 6,217,198 | 6,213,913 | 6,220,928 | 6,216,931 | 6,178,664
Diluted [Abstract] |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding (in shares) | 6,221,851 | 6,221,515 | 6,220,569 | 6,219,775 | 6,219,384 | 6,219,241 | 6,217,198 | 6,213,913 | 6,220,928 | 6,216,931 | 6,178,664
Dilutive stock options (in shares) |  |  |  |  |  |  |  |  | 16,830 | 16,444 | 37,529
Denominator for diluted earnings per share (in shares) | 6,238,089 | 6,238,074 | 6,238,025 | 6,236,842 | 6,237,709 | 6,234,727 | 6,231,335 | 6,231,739 | 6,237,758 | 6,233,375 | 6,216,193
Anti-dilutive stock options (in shares) |  |  |  |  |  |  |  |  | 0 | 0 | 0
Stock Based Compensation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  |  |  |  | 0 | 0 | 0
Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Options granted (in shares) |  |  |  |  |  |  |  |  | 0 | 0 | 0
Industrial Hardware Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Gross Amount | 2,595,931 |  |  |  | 2,732,307 |  |  |  | 2,595,931 | 2,732,307 |
Accumulated Amortization | 1,676,440 |  |  |  | 1,652,199 |  |  |  | 1,676,440 | 1,652,199 |
Net per Balance Sheet | 919,491 |  |  |  | 1,080,108 |  |  |  | 919,491 | 1,080,108 |
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 2,099,783 |  |  |  | 2,071,393 | 2,099,783 | 2,071,393 |
Foreign exchange |  |  |  |  |  |  |  |  | (91,552) | 28,390 |
Ending balance | 2,008,231 |  |  |  | 2,099,783 |  |  |  | 2,008,231 | 2,099,783 |
Security Products Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Gross Amount | 1,041,250 |  |  |  | 1,021,409 |  |  |  | 1,041,250 | 1,021,409 |
Accumulated Amortization | 503,238 |  |  |  | 447,732 |  |  |  | 503,238 | 447,732 |
Net per Balance Sheet | 538,012 |  |  |  | 573,677 |  |  |  | 538,012 | 573,677 |
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 11,833,816 |  |  |  | 11,833,816 | 11,833,816 | 11,833,816 |
Foreign exchange |  |  |  |  |  |  |  |  | 0 | 0 |
Ending balance | 11,833,816 |  |  |  | 11,833,816 |  |  |  | 11,833,816 | 11,833,816 |
Metal Products Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Gross Amount | 0 |  |  |  | 5,839 |  |  |  | 0 | 5,839 |
Accumulated Amortization | 0 |  |  |  | 5,667 |  |  |  | 0 | 5,667 |
Net per Balance Sheet | 0 |  |  |  | 172 |  |  |  | 0 | 172 |
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 0 |  |  |  | 0 | 0 | 0 |
Foreign exchange |  |  |  |  |  |  |  |  | 0 | 0 |
Ending balance | $ 0 |  |  |  | $ 0 |  |  |  | $ 0 | $ 0 |
Non-Compete Agreements [Member] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Useful lives of intangible assets |  |  |  |  |  |  |  |  | 5 years |  |
Minimum [Member] | Technology and Licenses [Member] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Useful lives of intangible assets |  |  |  |  |  |  |  |  | 5 years |  |
Maximum [Member] | Technology and Licenses [Member] |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Useful lives of intangible assets |  |  |  |  |  |  |  |  | 17 years |  |
Building [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of the assets |  |  |  |  |  |  |  |  | 10 years |  |
Building [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of the assets |  |  |  |  |  |  |  |  | 39 years 6 months |  |
Machinery and Equipment [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of the assets |  |  |  |  |  |  |  |  | 3 years |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives of the assets |  |  |  |  |  |  |  |  | 10 years |  |
Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |  |  |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of major customers |  |  |  |  |  |  |  |  | 0 | 0 |
Threshold percentage of concentration risk (in hundredths) |  |  |  |  |  |  |  |  | 10.00% | 10.00% |

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- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 28A -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1500-109256 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + Details
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