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Goodwill and Intangible Assets, net (Details Textual) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Goodwill and Intangible Assets, net (Textual) [Abstract]        
Disposal or recognition of additional goodwill     $ 0  
Impairment charges on goodwill     0  
Goodwill balance at September 30, 2012 1,316,000   1,316,000  
Amortization expenses of intangible assets 50,000 51,000 151,000 152,000
Impairment charges recognized related to the acquired intangible assets 0 0 0 0
Annual amortization expense of the intangible assets, for remaining three months of 2012 50,000   50,000  
Annual amortization expense of the intangible assets, 2013 200,000   200,000  
Annual amortization expense of the intangible assets, 2014 200,000   200,000  
Annual amortization expense of the intangible assets, 2015 200,000   200,000  
Annual amortization expense of the intangible assets, 2016 200,000   200,000  
Annual amortization expense of the intangible assets, 2017 200,000   200,000  
Annual amortization expense of the intangible assets, 2018 200,000   200,000  
Annual amortization expense of the intangible assets, 2019 200,000   200,000  
Annual amortization expense of the intangible assets, 2020 100,000   100,000  
Goodwill balance at December 31, 2011     $ 1,316,000