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Property and Equipment (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Property, Plant and Equipment [Line Items]    
Depreciation, Depletion and Amortization $ 727us-gaap_DepreciationDepletionAndAmortization $ 712us-gaap_DepreciationDepletionAndAmortization
Property, Plant and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Depreciation, Depletion and Amortization $ 500us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_PropertyPlantAndEquipmentMember
$ 700us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_PropertyPlantAndEquipmentMember