Intangibles (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 28, 2013	Dec. 29, 2012
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Net as per Balance Sheet	$ 1,519,100	$ 1,653,957
Patents and developed technology [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	3,712,337	3,759,555
Accumulated Amortization	2,193,237	2,105,598
Net as per Balance Sheet	1,519,100	1,653,957
Weighted Average Amortization Period	16 years 1 month 6 days	15 years 9 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	2,669,756	2,732,307
Accumulated Amortization	1,689,150	1,652,199
Net as per Balance Sheet	980,606	1,080,108
Patents and developed technology [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	1,036,742	1,021,409
Accumulated Amortization	498,248	447,732
Net as per Balance Sheet	538,494	573,677
Patents and developed technology [Member] | Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	5,839	5,839
Accumulated Amortization	5,839	5,667
Net as per Balance Sheet	$ 0	$ 172
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
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	5 years
Non-compete agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	5 years