CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Investment securities, available-for sale, Amortized cost current	$ 21,139	$ 0
Investment securities, held-to-maturity, Fair value current	308	266
Investment securities, available-for sale, Amortized cost noncurrent	146,796	53,953
Investment securities, held-to-maturity, Fair value noncurrent	$ 419	$ 471
Preferred stock par value, (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	0	155,387,025
Preferred stock, shares issued (in shares)	0	139,444,346
Preferred stock, shares outstanding (in shares)	0	139,444,346
Liquidation preference	$ 0	$ 470,256
Treasury stock, shares held (in shares)	14,730	0
Common Class A
Common stock, par value, (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	2,500,000,000	0
Common stock, shares, issued (in shares)	278,308,964	0
Common stock, shares, outstanding (in shares)	278,308,964	0
Common Class B
Common stock, par value, (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	500,000,000	351,572,668
Common stock, shares, issued (in shares)	142,318,711	89,206,266
Common stock, shares, outstanding (in shares)	142,318,711	89,206,266