Balance Sheet Components - Prepaid Expense and Other Current Assets (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Government incentives receivable		$ 479	$ 479
Prepaid hardware and software maintenance		5,304	5,227
Receivables from employees		5,251	5,160
Other prepaid expenses and other current assets		15,775	19,852
Prepaid Expense and Other Assets, Current	[1]	$ 26,809	$ 30,718

[1] We have variable interest entities, which represent a portion of the consolidated balances recorded within these financial statement line items in the condensed consolidated balance sheets (see Note 11 - Portfolio Financings).