CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 110,718	$ 109,966
Marketable securities (Note 4)	439,252	264,915
Accounts receivable	0	15,000
Contract assets	1,317	3,762
Prepaid expenses and other current assets	17,428	11,674
Total current assets	568,715	405,317
Marketable securities, non-current (Note 4)	361,035	61,434
Property and equipment, net (Note 6)	51,244	48,134
Right-of-use assets, operating leases	48,065	52,945
Other non-current assets	0	2,118
Restricted cash	5,783	5,811
Total assets	1,034,842	575,759
Current liabilities:
Accounts payable	6,494	7,075
Accrued expenses (Note 8)	26,530	33,864
Deferred revenue	20,024	37,883
Operating lease liabilities	11,508	5,068
Finance lease liabilities	1,343	1,277
Other current liabilities	633	524
Total current liabilities	66,532	85,691
Non-current liabilities
Deferred revenue, net of current portion	0	16,768
Operating lease liabilities, net of current portion	73,636	77,028
Finance lease liabilities, net of current portion	1,744	1,301
Total liabilities	141,912	180,788
Stockholders’ equity:
Common stock, $0.0001 par value; 150,000,000 shares authorized at September 30, 2024 and December 31, 2023, 64,748,226 and 55,390,259 shares issued and outstanding at September 30, 2024 and December 31, 2023, respectively	7	6
Additional paid-in capital	1,574,850	926,269
Accumulated deficit	(683,858)	(530,752)
Accumulated other comprehensive loss	1,931	(552)
Total stockholders’ equity	892,930	394,971
Total liabilities and stockholders’ equity	$ 1,034,842	$ 575,759