Intangibles (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jul. 01, 2017	Dec. 31, 2016
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	$ 12,470,692	$ 4,358,510
Accumulated amortization	3,016,778	2,594,061
Net as per balance sheet	$ 9,453,914	$ 1,764,449
Weighted average amortization period	11 years 2 months 12 days	12 years 3 months 18 days
Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	$ 10,258,772	$ 2,159,060
Accumulated amortization	1,795,573	1,529,675
Net as per balance sheet	8,463,199	629,385
Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	2,211,920	2,199,450
Accumulated amortization	1,221,205	1,064,386
Net as per balance sheet	990,715	1,135,064
Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	0	0
Accumulated amortization	0	0
Net as per balance sheet	0	0
Patents and Developed Technology [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	7,656,616	3,194,434
Accumulated amortization	$ 2,343,491	$ 2,128,431
Weighted average amortization period	12 years 10 months 24 days	15 years 7 months 6 days
Patents and Developed Technology [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	$ 6,608,772	$ 2,159,060
Accumulated amortization	1,704,323	1,529,675
Patents and Developed Technology [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	1,047,844	1,035,374
Accumulated amortization	639,168	598,756
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	4,099,706	449,706
Accumulated amortization	$ 316,103	$ 179,882
Weighted average amortization period	9 years 6 months	5 years
Customer Relationships [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	$ 3,650,000	$ 0
Accumulated amortization	91,250	0
Customer Relationships [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross amount	449,706	449,706
Accumulated amortization	224,853	179,882
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	407,000	407,000
Accumulated amortization	$ 203,500	$ 162,800
Weighted average amortization period	5 years	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	407,000	407,000
Accumulated amortization	203,500	162,800
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	$ 153,684	$ 122,948
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	153,684	122,948
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