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Property and Equipment (Details Textual)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Nov. 30, 2013
ft²
Mar. 31, 2013
ft²
Phoenix [Member]            
Property, Plant and Equipment [Line Items]            
Area of Building | ft²         10,000 10,000
Property And Equipment Under Capital Lease            
Property, Plant and Equipment [Line Items]            
Depreciation expense $ 300 $ 400 $ 600 $ 700    
Capital Leased Assets, Gross $ 100 $ 200 $ 100 $ 200