INTANGIBLES (Details) - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Amortization expense fiscal year maturity [Abstract]
2019	$ 1,211,000
2020	958,000
2021	937,000
2022	931,000
2023	987,000
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	15,089,550	$ 12,910,450
Accumulated Amortization	4,807,830	3,635,292
Net per Balance Sheet	$ 10,281,720	$ 9,275,158
Weighted-Average Amortization Period	9 years 2 months 12 days	10 years 9 months 18 days
Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	$ 11,534,498	$ 10,724,456
Accumulated Amortization	3,087,130	2,306,063
Net per Balance Sheet	8,447,368	8,418,393
Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	3,555,052	2,185,994
Accumulated Amortization	1,720,700	1,329,229
Net per Balance Sheet	1,834,352	856,765
Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	0	0
Accumulated Amortization	0	0
Net per Balance Sheet	0	0
Patents and Developed Technology [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	9,533,229	8,096,374
Accumulated Amortization	$ 3,185,656	$ 2,638,202
Weighted-Average Amortization Period	10 years 2 months 12 days	12 years 3 months 18 days
Patents and Developed Technology [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	$ 7,884,498	$ 7,074,456
Accumulated Amortization	2,448,380	2,007,418
Patents and Developed Technology [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	1,648,731	1,021,918
Accumulated Amortization	737,276	630,784
Patents and Developed Technology [Member] | Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	0	0
Accumulated Amortization	0	0
Customer Relationships [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	4,789,381	4,099,706
Accumulated Amortization	$ 1,046,983	$ 568,468
Weighted-Average Amortization Period	8 years 1 month 6 days	9 years 6 months
Customer Relationships [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	$ 3,650,000	$ 3,650,000
Accumulated Amortization	638,750	298,645
Customer Relationships [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	1,139,381	449,706
Accumulated Amortization	408,233	269,823
Customer Relationships [Member] | Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	0	0
Accumulated Amortization	0	0
Non-Compete Agreements [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	459,570	407,000
Accumulated Amortization	$ 329,296	$ 244,200
Weighted-Average Amortization Period	4 years 4 months 24 days	5 years
Non-Compete Agreements [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	$ 0	$ 0
Accumulated Amortization	0	0
Non-Compete Agreements [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	459,570	407,000
Accumulated Amortization	329,296	244,200
Non-Compete Agreements [Member] | Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	0	0
Accumulated Amortization	0	0
Intellectual Property [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	307,370	307,370
Accumulated Amortization	$ 245,895	$ 184,422
Weighted-Average Amortization Period	5 years	5 years
Intellectual Property [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	$ 0	$ 0
Accumulated Amortization	0	0
Intellectual Property [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	307,370	307,370
Accumulated Amortization	245,895	184,422
Intellectual Property [Member] | Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	0	0
Accumulated Amortization	$ 0	$ 0