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Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Acquisition of intangible assets    
Less: accumulated amortization $ (194)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization $ (147)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible assets, net 131us-gaap_FiniteLivedIntangibleAssetsNet 178us-gaap_FiniteLivedIntangibleAssetsNet
Software and development costs    
Acquisition of intangible assets    
Amortization Life Years 5 years  
Total intangible assets, gross $ 325us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember
$ 325us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_ComputerSoftwareIntangibleAssetMember