Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 147,781	$ 123,406
Marketable securities	726,494	625,282
Accounts receivable ($0 million and $0.1 million respectively from related party)	2,854	2,031
Prepaid expenses and other current assets	18,304	18,584
Total current assets	895,433	769,303
Marketable securities - noncurrent	32,604	337,361
Property and equipment, net	25,868	20,968
Operating lease right-of-use assets	73,775	79,143
Equity method investment	45,616	58,131
Investments and other assets ($10.0 million at the end of each period from related party)	37,128	29,558
Total Assets	1,110,424	1,294,464
Current Liabilities:
Accounts payable	7,515	9,653
Accrued expenses ($0.1 million and $0 million respectively from related party)	44,871	43,309
Current portion of operating lease liability	9,568	9,112
Current portion of deferred revenue ($39.3 million at the end of each period from related party)	61,806	63,759
Total current liabilities	123,760	125,833
Deferred revenue, net of current portion ($2.9million and $ 19.9million respectively from related party)	35,330	63,476
Long-term operating lease liability	59,997	64,911
Other long-term liabilities	10,790	0
Commitments and contingencies (Note 6)
Stockholders’ Equity:
Common stock, $0.0001 par value; 120,000,000 shares authorized; 76,000,745 and 74,485,883 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	8	7
Additional paid-in capital	1,840,644	1,745,870
Accumulated other comprehensive loss	(9,554)	(2,632)
Accumulated deficit	(950,551)	(703,001)
Total stockholders’ equity	880,547	1,040,244
Total Liabilities and Stockholders’ Equity	$ 1,110,424	$ 1,294,464