Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 433,670	$ 124,806
Marketable securities	170,041	253,458
Prepaid expenses and other current assets	9,134	6,203
Total current assets	612,845	384,467
Property and equipment, net	63,445	46,775
Operating lease right-of-use assets	84,828	63,168
Restricted cash	8,819	2,143
Long-term marketable securities	262,401	33,731
Intangible asset	59,195	59,195
Goodwill	140,627	140,627
Other non-current assets	591	190
TOTAL ASSETS	1,232,751	730,296
Current liabilities:
Accounts payable	3,947	2,253
Accrued compensation	20,218	16,020
Accrued expenses and other current liabilities	12,884	9,466
Operating lease liabilities	6,502	3,712
Contingent consideration	43,459
Success payment liabilities	5,000
Total current liabilities	92,010	31,451
Operating lease liabilities, net of current portion	92,403	68,197
Contingent consideration, net of current portion	88,522	121,901
Success payment liabilities, net of current portion	129,192	76,494
Other non-current liabilities	539	540
Total liabilities	402,666	298,583
Commitments and contingencies (Note 10)
Convertible preferred stock, $0.0001 par value; zero and 537,786 shares authorized as of September 30, 2021 and December 31, 2020, respectively; zero and 134,113 shares issued and outstanding as of September 30, 2021 and December 31, 2020, respectively		852,897
Stockholders' equity (deficit):
Preferred stock, $0.0001 par value; 50,000 and zero shares authorized as of September 30, 2021 and December 31, 2020, respectively; zero shares issued and outstanding as of September 30, 2021 and December 31, 2020, respectively
Common stock, $0.0001 par value; 750,000 and 707,000 shares authorized as of September 30, 2021 and December 31, 2020, respectively; 182,908 and 16,170 shares issued and outstanding as of September 30, 2021 and December 31, 2020, respectively	18	2
Additional paid-in capital	1,504,778	8,216
Accumulated other comprehensive income (loss)	(82)	30
Accumulated deficit	(674,629)	(429,432)
Total stockholders' equity (deficit)	830,085	(421,184)
TOTAL LIABILITIES, CONVERTIBLE PREFERRED STOCK, AND STOCKHOLDERS' EQUITY (DEFICIT)	$ 1,232,751	$ 730,296