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REPORTABLE SEGMENTS (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2016
Oct. 01, 2016
Jul. 02, 2016
Apr. 02, 2016
Jan. 02, 2016
Oct. 03, 2015
Jul. 04, 2015
Apr. 04, 2015
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Segment Reporting Information [Line Items]                      
Sales $ 34,144,942 $ 33,478,347 $ 36,883,312 $ 33,101,657 $ 34,413,912 $ 36,239,500 $ 37,037,697 $ 36,876,842 $ 137,608,258 $ 144,567,951 $ 140,825,360
Operating profit                 11,135,872 8,027,728 11,718,648
Interest expense                 (121,500) (185,475) (254,576)
Other income                 209,043 178,722 64,691
Income before income taxes                 11,223,415 8,020,975 11,528,763
Assets 124,198,396       121,738,559       124,198,396 121,738,559 121,270,556
Depreciation and amortization                 3,814,393 3,921,438 3,486,302
Capital expenditures before currency translation adjustment                 2,820,759 2,500,377 3,567,238
Currency translation adjustment                 (8,889) 25,020 10,347
Capital expenditures                 2,863,470 2,538,236 3,633,165
Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Assets 100,246,515       104,045,708       100,246,515 104,045,708 102,271,004
Operating Segments [Member] | Industrial Hardware [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 61,058,871 61,338,812 58,666,229
Operating profit                 5,683,730 4,314,149 5,063,786
Assets 32,278,281       30,425,348       32,278,281 30,425,348 29,660,695
Depreciation and amortization                 1,468,904 1,580,741 1,631,521
Capital expenditures before currency translation adjustment                 648,516 1,479,984 1,929,022
Operating Segments [Member] | Security Products [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 57,255,101 56,598,487 49,381,553
Operating profit                 5,677,264 3,798,115 4,058,554
Assets 49,520,708       52,688,497       49,520,708 52,688,497 51,573,271
Depreciation and amortization                 980,048 1,010,262 621,501
Capital expenditures before currency translation adjustment                 1,018,371 388,377 973,365
Operating Segments [Member] | Metal Products [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 19,294,286 26,630,652 32,777,578
Operating profit                 (225,122) (84,536) 2,596,308
Assets 18,447,526       20,931,863       18,447,526 20,931,863 21,037,058
Depreciation and amortization                 1,365,441 1,330,435 1,233,280
Capital expenditures before currency translation adjustment                 1,153,872 632,016 644,851
Intersegment Eliminations [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 3,354,207 3,425,976 3,549,925
Intersegment Eliminations [Member] | Industrial Hardware [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 637,405 595,596 984,192
Intersegment Eliminations [Member] | Security Products [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 2,716,802 2,813,576 2,565,733
Intersegment Eliminations [Member] | Metal Products [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 0 16,804 0
General Corporate [Member]                      
Segment Reporting Information [Line Items]                      
Assets 23,951,881       17,692,851       23,951,881 17,692,851 18,999,552
Capital expenditures                 51,600 12,839 55,580
Reportable Geographical Components [Member] | United States [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 117,679,860 126,115,036 117,478,557
Assets 107,031,435       106,662,743       107,031,435 106,662,743 105,771,961
Reportable Geographical Components [Member] | Foreign [Member]                      
Segment Reporting Information [Line Items]                      
Sales                 19,928,398 18,452,915 23,346,803
Assets $ 17,166,961       $ 15,075,816       $ 17,166,961 $ 15,075,816 $ 15,498,595