Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 120,256	$ 109,966
Marketable securities	368,488	264,915
Accounts Receivable	0	15,000
Contract assets	947	3,762
Prepaid expenses and other current assets	20,577	11,674
Total current assets	510,268	405,317
Marketable securities, non-current	362,159	61,434
Property and equipment, net	50,457	48,134
Right-of-use assets, operating leases	47,407	52,945
Other non-current assets	1,950	2,118
Restricted cash	5,794	5,811
Total assets	978,035	575,759
Current liabilities:
Accounts payable	5,989	7,075
Accrued expenses	34,867	33,864
Deferred revenue	13,576	37,883
Operating lease liabilities	11,594	5,068
Finance lease liabilities	1,518	1,277
Other current liabilities	223	524
Total current liabilities	67,767	85,691
Non-current liabilities
Deferred revenue, net of current portion	0	16,768
Operating lease liabilities, net of current portion	72,423	77,028
Finance lease liabilities, net of current portion	2,226	1,301
Other non-current liabilities	0	0
Total liabilities	142,416	180,788
Commitments and contingencies (Note 9)
Stockholders' equity:
Common stock, $0.0001 par value; 150,000,000 shares authorized at December 31, 2024 and 2023, 64,890,193 and 55,585,305 shares issued and outstanding at December 31, 2024 and 2023, respectively;	7	6
Additional paid-in capital	1,591,707	926,269
Accumulated deficit	(754,610)	(530,752)
Accumulated other comprehensive loss	(1,485)	(552)
Total stockholders' equity	835,619	394,971
Total liabilities and stockholders' equity	$ 978,035	$ 575,759