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Goodwill and Intangible Assets (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 (Textual) [Abstract]        
Amortization expense of finite life intangible assets $ 80,000 $ 118,000 $ 252,000 $ 341,000
Amortization expense of finite life intangibles for remainder of 2012 64,000   64,000  
Amortization expense of finite life intangibles for 2013 130,000   130,000  
Amortization expense of finite life intangibles for 2014 69,000   69,000  
Amortization expense of finite life intangibles for 2015 6,000   6,000  
Amortization expense of finite life intangibles for 2016 $ 5,000   $ 5,000