Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 188,517	$ 253,029
Marketable securities	323,861	297,967
Prepaid expenses and other current assets	10,842	7,105
Total current assets	523,220	558,101
Long-term marketable securities	145,014	195,881
Property and equipment, net	68,693	65,464
Operating lease right-of-use assets	97,145	96,320
Restricted cash	8,819	8,819
Intangible asset	59,195	59,195
Goodwill	140,627	140,627
Other non-current assets	4,900	5,000
TOTAL ASSETS	1,047,613	1,129,407
Current liabilities:
Accounts payable	4,765	2,219
Accrued compensation	16,889	21,131
Accrued expenses and other current liabilities	11,321	10,344
Operating lease liabilities	9,635	9,159
Contingent consideration	50,900	51,382
Success payment liabilities		5,000
Total current liabilities	93,510	99,235
Operating lease liabilities, net of current portion	102,518	101,784
Contingent consideration, net of current portion	102,315	102,361
Success payment liabilities, net of current portion	47,615	97,525
Total liabilities	345,958	400,905
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, $0.0001 par value; 50,000 shares authorized; zero shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively
Common stock, $0.0001 par value; 750,000 shares authorized; 186,632 and 184,929 shares issued and outstanding as of March 31, 2022 and December 31, 2021, respectively	19	18
Additional paid-in capital	1,523,616	1,515,210
Accumulated other comprehensive loss	(5,172)	(1,366)
Accumulated deficit	(816,808)	(785,360)
Total stockholders' equity	701,655	728,502
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,047,613	$ 1,129,407