Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 615,386	$ 1,337,586
Short-term investments	377,312	0
Accounts receivable, net	1,377	1,599
Prepaid expenses and other current assets	13,477	13,995
Total current assets	1,007,552	1,353,180
Property and equipment, net	17,083	36,053
Operating lease right-of-use assets	44,952	0
Other assets	4,692	7,090
Total assets	1,074,279	1,396,323
Current liabilities:
Accounts payable	9,855	4,544
Amounts due to joint development partners	5,753	7,394
Accrued expenses and other current liabilities	48,260	41,698
Short-term debt	1,645	1,524
Capital lease liabilities, current		766
Operating lease liabilities, current	6,007	0
Total current liabilities	71,520	55,926
Capital lease liabilities, noncurrent		2,872
Operating lease liabilities, noncurrent	42,169	0
Long-term debt	3,668	5,543
Other liabilities	2,441	5,004
Total liabilities	119,798	69,345
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock	0	0
Common Stock, $0.0001 par value, 4,876,000,000 Class A shares authorized as of December 31, 2021 and 2022; 197,833,195 and 201,707,557 Class A shares issued and outstanding as of December 31, 2021 and 2022, respectively; 24,000,000 Class B shares authorized, issued and outstanding as of December 31, 2021 and 2022, respectively	22	22
Additional paid-in capital	2,567,723	2,464,730
Accumulated other comprehensive income (loss)	(3,559)	77
Accumulated deficit	(1,609,705)	(1,137,851)
Total stockholders’ equity	954,481	1,326,978
Total liabilities and stockholders’ equity	$ 1,074,279	$ 1,396,323
Preferred stock, authorized (in shares)	100,000,000	100,000,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001