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Property and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Gross $ 104,165   $ 104,165   $ 94,620
Property, Plant and Equipment, Net 50,069   50,069   43,521
Depreciation 2,192 $ 1,614 4,145 $ 3,307  
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment (54,096)   (54,096)   (51,099)
Land [Member]          
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Gross 3,828   3,828   3,828
Building and Building Improvements [Member]          
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Gross 24,082   24,082   24,038
Leasehold Improvements [Member]          
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Gross 473   473   429
Machinery and Equipment [Member]          
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Gross 24,958   24,958   24,764
Hardware Revenue Generating Asset [Member]          
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Net 37,246   37,246   28,453
Office And Computer Equipment [Member]          
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Gross 13,527   13,527   13,057
Vehicles [Member]          
Property, Plant and Equipment [Line Items]          
Property, Plant and Equipment, Gross $ 51   $ 51   $ 51