Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 675,140	$ 124,806
Marketable securities	177,696	253,458
Prepaid expenses and other current assets	7,504	6,203
Total current assets	860,340	384,467
Property and equipment, net	58,670	46,775
Operating lease right-of-use assets	60,330	63,168
Restricted cash	2,143	2,143
Long-term marketable securities	77,934	33,731
Intangible asset	59,195	59,195
Goodwill	140,627	140,627
Other non-current assets	598	190
TOTAL ASSETS	1,259,837	730,296
Current liabilities:
Accounts payable	3,704	2,253
Accrued compensation	15,294	16,020
Accrued expenses and other current liabilities	12,830	9,466
Operating lease liabilities	6,004	3,712
Success payment liabilities	5,000
Total current liabilities	42,832	31,451
Operating lease liabilities, net of current portion	66,149	68,197
Contingent consideration	140,457	121,901
Success payment liabilities, net of current portion	103,963	76,494
Other non-current liabilities	539	540
Total liabilities	353,940	298,583
Commitments and contingencies (Note 10)
Convertible preferred stock, $0.0001 par value; zero and 537,786 shares authorized as of June 30, 2021 and December 31, 2020, respectively; zero and 134,113 shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively; aggregate liquidation preference of zero and $926,666 as of June 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 June 30, 2021 and December 31, 2020, respectively; zero shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively
Common stock, $0.0001 par value; 750,000 and 707,000 shares authorized as of June 30, 2021 and December 31, 2020, respectively; 180,576 and 16,170 shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively	18	2
Additional paid-in capital	1,497,232	8,216
Accumulated other comprehensive income	13	30
Accumulated deficit	(591,366)	(429,432)
Total stockholders' equity (deficit)	905,897	(421,184)
TOTAL LIABILITIES, CONVERTIBLE PREFERRED STOCK, AND STOCKHOLDERS' EQUITY (DEFICIT)	$ 1,259,837	$ 730,296