Breakdown of Revenue and Non-Current Assets by Geographical Areas - Other Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	$ 274,019	$ 281,047
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	96,312	104,389
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	96,123	100,107
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	8,408	20,336
Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	32,295	19,701
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	20,389	9,617
Singapore
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	7,952	5,970
Holding
Revenues from External Customers and Long-Lived Assets [Line Items]
Non-current assets	$ 137,004	$ 136,621