Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,412,128	$ 310,815
Accounts receivable, net	1,704	1,144
Prepaid expenses and other current assets	15,900	3,816
Amounts due from related parties	0	3,708
Total current assets	1,429,732	319,483
Property and equipment, net	29,419	22,116
Other assets	5,875	4,986
Total assets	1,465,026	346,585
Current liabilities:
Accounts payable	4,416	4,542
Amounts due to related parties	0	4,360
Amounts due to joint development partners	6,997	1,355
Accrued expenses and other current liabilities	33,106	22,961
Short-term debt	813	4,623
Warrants liability	0	42,452
Capital lease liabilities, current	796	805
Total current liabilities	46,128	81,098
Capital lease liabilities, noncurrent	3,045	3,767
Other liabilities	5,814	2,402
Total liabilities	54,987	87,267
Commitments and contingencies (Note 4)
Redeemable convertible preferred stock, $0.0001 par value; 138,102,770 and zero shares authorized as of December 31, 2020 and September 30, 2021; 102,074,703 and zero shares issued and outstanding as of December 31, 2020 and September 30, 2021, respectively; aggregate liquidation preference of $598,842 and $0 as of December 31, 2020 and September 30, 2021, respectively	0	664,791
Stockholders' equity (deficit):
Common stock, $0.0001 par value; 361,897,230 and 4,876,000,000 Class A shares authorized as of December 31, 2020 and September 30, 2021; 60,543,337 and 188,994,830 shares issued and outstanding as of December 31, 2020 and September 30, 2021, respectively; zero and 24,000,000 Class B shares authorized as of December 31, 2020 and September 30, 2021; zero and 24,000,000 shares issued and outstanding as of December 31, 2020 and September 30, 2021, respectively	21	6
Additional paid-in-capital	2,432,613	0
Accumulated other comprehensive loss	(238)	(301)
Accumulated deficit	(1,022,357)	(405,178)
Total stockholders’ equity (deficit)	1,410,039	(405,473)
Total liabilities, redeemable convertible preferred stock and stockholders’ equity (deficit)	$ 1,465,026	$ 346,585