Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 109,966	$ 68,395
Marketable securities (Note 4)	264,915	338,771
Accounts Receivable	15,000	0
Contract assets-due from related party	3,762	2,537
Prepaid expenses and other current assets	11,674	9,713
Total current assets	405,317	419,416
Marketable securities, non-current (Note 4)	61,434	152,328
Property and equipment, net (Note 6)	48,134	13,334
Right-of-use assets, operating leases	52,945	8,909
Other non-current assets	2,118	3,017
Restricted cash	5,811	6,130
Total assets	575,759	603,134
Current liabilities:
Accounts payable	7,075	4,335
Accrued expenses (Note 8)	33,864	27,502
Deferred revenue	37,883	35,260
Operating lease liabilities	5,068	2,535
Finance lease liabilities	1,277	1,408
Other current liabilities	524	303
Total current liabilities	85,691	71,343
Non-current liabilities
Deferred revenue, net of current portion	16,768	28,000
Operating lease liabilities, net of current portion	77,028	12,146
Finance lease liabilities, net of current portion	1,301	1,246
Other non-current liabilities	0	248
Total liabilities	180,788	112,983
Commitments and contingencies (Note 9)
Stockholders' equity:
Common stock, $0.0001 par value; 150,000,000 shares authorized at December 31, 2022 and 2021, 55,039,380 and 51,573,924 shares issued at December 31, 2022 and 2021, respectively; 55,039,380 and 51,536,181 shares outstanding at December 31, 2022 and 2021, respectively	6	6
Additional paid-in capital	926,269	878,884
Accumulated deficit	(530,752)	(383,790)
Accumulated other comprehensive loss	(552)	(4,949)
Total stockholders' equity	394,971	490,151
Total liabilities and stockholders' equity	$ 575,759	$ 603,134