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Goodwill and Intangible Assets (Details 1) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Intangible assets - finite life    
Cost $ 6,110 $ 4,157
Accumulated Amortization 1,730 2,874
Patents [Member]
   
Intangible assets - finite life    
Cost 1,414 1,414
Accumulated Amortization 1,301 1,281
Employment agreements [Member]
   
Intangible assets - finite life    
Cost 170 170
Accumulated Amortization 10 0
Technology [Member]
   
Intangible assets - finite life    
Cost 270 230
Accumulated Amortization 14 0
Customer lists [Member]
   
Intangible assets - finite life    
Cost 4,256 2,343
Accumulated Amortization $ 405 $ 1,593