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Condensed Consolidated Financial Statement Details - Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Abstract]    
Prepaid expenses $ 6,675 $ 6,679
Deferred contract acquisition costs 5,711 6,564
Other 4,727 1,419
Total prepaid and other current assets $ 17,113 $ 14,662