Balance Sheet Components - Other Long-Term Liabilities (Details) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Delaware grant		$ 9,212	$ 9,212
Other		10,655	8,056
Other long-term liabilities	[1]	$ 19,867	$ 17,268

[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).