Annual report pursuant to Section 13 and 15(d)

Property, Plant, and Equipment, net - Deprecation Expense (Details)

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Property, Plant, and Equipment, net - Deprecation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Total depreciation expense $ 9,447 $ 7,179 $ 3,903
Cost of sales      
Property, Plant and Equipment [Line Items]      
Total depreciation expense 2,957 2,820 1,113
Sales and marketing expenses      
Property, Plant and Equipment [Line Items]      
Total depreciation expense 893 471 0
Product development      
Property, Plant and Equipment [Line Items]      
Total depreciation expense 1,443 858 71
General and administrative      
Property, Plant and Equipment [Line Items]      
Total depreciation expense $ 4,154 $ 3,030 $ 2,719