Annual report pursuant to Section 13 and 15(d)

Property and Equipment, net - Schedule of Property and Equipment, net (Details)

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Property and Equipment, net - Schedule of Property and Equipment, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 91,731 $ 86,238
Less: Accumulated depreciation and amortization (55,329) (37,767)
Total property and equipment, net 36,402 48,471
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Total property and equipment 4,126 3,491
Leasehold improvements, furniture, and computer hardware    
Property, Plant and Equipment [Line Items]    
Total property and equipment 13,709 13,407
Vehicles    
Property, Plant and Equipment [Line Items]    
Total property and equipment 43,413 44,788
Computer software    
Property, Plant and Equipment [Line Items]    
Total property and equipment $ 30,483 $ 24,552