Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 871,360	$ 1,337,586
Total short-term investments	197,786	0
Accounts receivable, net	2,988	1,599
Prepaid expenses and other current assets	18,582	13,995
Total current assets	1,090,716	1,353,180
Property and equipment, net	38,226	36,053
Operating lease right-of-use assets	46,370	0
Other assets	4,951	7,090
Total assets	1,180,263	1,396,323
Current liabilities:
Accounts payable	6,666	4,544
Amounts due to joint development partners	4,791	7,394
Accrued expenses and other current liabilities	40,412	41,698
Short-term debt	1,613	1,524
Capital lease liabilities, current	0	766
Operating lease liabilities, current	5,983	0
Total current liabilities	59,465	55,926
Capital lease liabilities, noncurrent	0	2,872
Operating lease liabilities, noncurrent	41,920	0
Long-term debt	4,086	5,543
Other liabilities	6,026	5,004
Total liabilities	111,497	69,345
Commitments and contingencies (Note 4)
Preferred Stock, Shares Issued	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, authorized (in shares)	100,000,000	100,000,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Stockholders' equity:
Preferred stock, $0.0001 par value; 100,000,000 shares authorized as of December 31, 2021 and September 30, 2022; zero shares issued and outstanding as of December 31, 2021 and September 30, 2022	$ 0	$ 0
Common stock, $0.0001 par value; 4,876,000,000 Class A shares authorized as of December 31, 2021 and June 30, 2022; 197,833,195 and — Class A shares issued and outstanding as of December 31, 2021 and June 30, 2022, respectively; 24,000,000 Class B shares authorized as of December 31, 2021 and June 30, 2022; 24,000,000 Class B shares issued and outstanding as of December 31, 2021 and June 30, 2022	22	22
Additional paid-in-capital	2,544,499	2,464,730
Accumulated other comprehensive income (loss)	(4,436)	77
Accumulated deficit	(1,471,319)	(1,137,851)
Total stockholders’ equity	1,068,766	1,326,978
Total liabilities and stockholders’ equity	$ 1,180,263	$ 1,396,323