Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 226,748	$ 523,506
Marketable securities	685,475	669,116
Accounts receivable ($0.2 million and $0.3 million, respectively,from related party)	36,456	3,768
Prepaid expenses and other current assets	49,651	20,407
Total current assets	998,330	1,216,797
Marketable securities - noncurrent	99,864	69,338
Property and equipment, net	32,760	27,921
Operating lease right-of-use assets	115,375	133,076
Equity method investment	11,765	32,455
Investments and other assets	42,883	40,527
Total Assets	1,300,977	1,520,114
Current Liabilities:
Accounts payable	7,452	5,154
Accrued expenses ($1.0 million and $1.6 million, respectively, from related party)	67,017	60,876
Current portion of operating lease liability	18,599	16,685
Current portion of deferred revenue ($0 and $19.9 million, respectively,from related party)	22,140	43,839
Total current liabilities	115,208	126,554
Deferred revenue, net of current portion	38,853	19,932
Long-term operating lease liability	96,747	114,018
Contingent consideration liability	0	24,026
Total liabilities	250,808	284,530
Commitments and contingencies (Note 8)
Stockholders’ Equity:
Common stock, $0.0001 par value; 240,000,000 and 120,000,000 shares authorized at December 31, 2023 and December 31, 2022, respectively;92,997,158 and 87,103,007 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively	9	9
Additional paid-in capital	2,710,797	2,420,223
Accumulated other comprehensive loss	(2,258)	(7,461)
Accumulated deficit	(1,658,379)	(1,177,187)
Total stockholders’ equity	1,050,169	1,235,584
Total Liabilities and Stockholders’ Equity	$ 1,300,977	$ 1,520,114