Intangibles (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 27, 2014	Dec. 28, 2013
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Net as per Balance Sheet	$ 1,395,236	$ 1,457,503
Patents and developed technology [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	3,644,836	3,637,181
Accumulated Amortization	2,249,600	2,179,678
Net as per Balance Sheet	1,395,236	1,457,503
Weighted Average Amortization Period	15 years 9 months 18 days	16 years
Patents and developed technology [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	2,582,456	2,595,931
Accumulated Amortization	1,690,710	1,676,440
Net as per Balance Sheet	891,746	919,491
Patents and developed technology [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	1,062,380	1,041,250
Accumulated Amortization	558,890	503,238
Net as per Balance Sheet	503,490	538,012
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
Net as per Balance Sheet	$ 0	$ 0
Technology and licenses [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	5 years
Technology and licenses [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	17 years