Acquisition (Details Textual) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 23, 2011
Acquisition (Textual) [Abstract]
Acquisition purchase price		$ 13,562,000
Acquisition-related costs incurred	$ 300,000
Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization periods for the identifiable intangible assets	12 years
Customer lists [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization periods for the identifiable intangible assets	5 years
Trademarks and Know How [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization periods for the identifiable intangible assets	5 years