Intangibles (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	15 years 7 months 21 days	11 years 8 months 12 days
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	$ 3,777,490	$ 5,871,762
Accumulated Amortization	2,095,320	4,101,754
Net as per Balance Sheet	1,682,170	1,770,008
Weighted Average Amortization Period	15 years 7 months 21 days	11 years 8 months 12 days
Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	2,773,370	2,790,725
Accumulated Amortization	1,650,112	1,588,667
Net as per Balance Sheet	1,123,258	1,202,058
Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	998,281	3,075,198
Accumulated Amortization	439,713	2,507,764
Net as per Balance Sheet	558,568	567,434
Metal Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	5,839	5,839
Accumulated Amortization	5,495	5,323
Net as per Balance Sheet	344	516
Technology and licenses [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	5 years
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Weighted Average Amortization Period	5 years
Technology and licenses [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	17 years
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Weighted Average Amortization Period	17 years
Patents and developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	15 years 9 months 18 days	15 years 6 months
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	3,701,665	3,783,391
Accumulated Amortization	2,027,077	2,028,548
Weighted Average Amortization Period	15 years 9 months 18 days	15 years 6 months
Patents and developed technology [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	2,697,545	2,714,900
Accumulated Amortization	1,581,869	1,528,007
Patents and developed technology [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	998,281	1,062,652
Accumulated Amortization	439,713	495,218
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	5,495	5,323
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	5 years	5 years
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	45,825	1,967,636
Accumulated Amortization	41,243	1,958,471
Weighted Average Amortization Period	5 years	5 years
Customer relationships [Member] | Industrial Hardware Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	45,825	45,825
Accumulated Amortization	41,243	36,660
Customer relationships [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	0	1,921,811
Accumulated Amortization	0	1,921,811
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]
Finite-Lived Intangible Assets [Line Items]
Useful lives of intangible assets	5 years	5 years
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	30,000	120,735
Accumulated Amortization	27,000	114,735
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	30,000	30,000
Accumulated Amortization	27,000	24,000
Non-compete agreements [Member] | Security Products Segment [Member]
Gross carrying amount and accumulated amortization of amortizable intangible assets [Abstract]
Gross Amount	0	90,735
Accumulated Amortization	0	90,735
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