Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Property, Plant and Equipment, net - Deprecation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]      
Total $ 46,504 $ 21,511 $ 9,447
Cost of sales      
Property, Plant and Equipment [Line Items]      
Total 29,798 10,855 2,957
Sales and marketing expenses      
Property, Plant and Equipment [Line Items]      
Total 3,219 1,793 893
Product development      
Property, Plant and Equipment [Line Items]      
Total 3,478 2,186 1,443
General and administrative      
Property, Plant and Equipment [Line Items]      
Total $ 10,009 $ 6,677 $ 4,154