Supplemental Balance Sheet Information - Schedule of Other Non-current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Goodwill	$ 109	$ 109
Prepayment of property and equipment	10,289	11,981
Payment of facility capacity expansion activities	24,881	25,193
Prepaid VAT	29,967	14,671
Rental deposits and other	3,209	1,823
Total	$ 68,455	$ 53,777