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Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Intangible Assets [Abstract]    
Gross carrying value $ 250 $ 250
Indefinite-Lived Net Intangible Assets (Excluding Goodwill) 250 250
Finite-Lived Intangible Assets, Net [Abstract]    
Gross carrying value 7,719 7,719
Accumulated amortization (4,538) (4,265)
Net carrying value 3,181 3,454
Noncompete Agreements [Member]
   
Finite-Lived Intangible Assets, Net [Abstract]    
Gross carrying value 593 593
Accumulated amortization (490) (477)
Net carrying value 103 116
Partner Relationships [Member]
   
Finite-Lived Intangible Assets, Net [Abstract]    
Gross carrying value 145 145
Accumulated amortization (145) (145)
Net carrying value 0 0
Customer Base [Member]
   
Finite-Lived Intangible Assets, Net [Abstract]    
Gross carrying value 641 641
Accumulated amortization (384) (361)
Net carrying value 257 280
Technology Rights [Member]
   
Finite-Lived Intangible Assets, Net [Abstract]    
Gross carrying value 5,330 5,330
Accumulated amortization (2,912) (2,689)
Net carrying value 2,418 2,641
Trade names [Member]
   
Finite-Lived Intangible Assets, Net [Abstract]    
Gross carrying value 760 760
Accumulated amortization (607) (593)
Net carrying value $ 153 $ 167