Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 189,182	$ 226,748
Marketable securities	412,333	685,475
Accounts receivable	8,517	36,456
Prepaid expenses and other current assets	29,831	49,651
Total current assets	639,863	998,330
Marketable securities - noncurrent	260,215	99,864
Property and equipment, net	27,381	32,760
Operating lease right-of-use assets	219,292	115,375
Equity method investment	0	11,765
Investments and other assets	44,264	42,883
Total assets	1,191,015	1,300,977
Current liabilities:
Accounts payable	14,589	7,452
Accrued expenses	55,355	67,017
Current portion of operating lease liability	20,246	18,599
Current portion of deferred revenue	20,661	22,140
Total current liabilities	110,851	115,208
Deferred revenue, net of current portion	18,256	38,853
Long-term operating lease liability	189,952	96,747
Total liabilities	319,059	250,808
Commitments and contingencies (Note 6)
Stockholders' equity:
Common stock, $0.0001 par value; 240,000,000 shares authorized at December 31, 2024 and December 31, 2023; 102,029,594 and 92,997,158 shares issued and outstanding at at December 31, 2024 and December 31, 2023, respectively	10	9
Additional paid-in capital	3,048,741	2,710,797
Accumulated other comprehensive income (loss)	605	(2,258)
Accumulated deficit	(2,177,400)	(1,658,379)
Total stockholders’ equity	871,956	1,050,169
Total liabilities and stockholders' equity	$ 1,191,015	$ 1,300,977