Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 347,815	$ 436,575
Short-term investments	217,182	300,286
Restricted cash and cash equivalents, current	8,594	7,993
Receivable from collaboration	773,079	0
Equity Investment Current	143,148	0
Prepaid expenses and other current assets	73,003	27,511
Total current assets	1,562,821	772,365
Intangible assets, net	33,287	33,820
Goodwill	16,937	16,937
Property and equipment, net	42,834	17,946
Operating right-of-use assets	87,220	61,947
Restricted cash and cash equivalents, noncurrent	7,006	6,919
Long-term investments	201,388	0
Other assets	2,775	8,827
TOTAL ASSETS	1,954,268	918,761
CURRENT LIABILITIES:
Accounts payable	6,521	5,077
Accrued and other liabilities	236,512	76,936
Deferred revenue, current portion	98,209	6,451
Contingent consideration, current portion	0	10,600
Total current liabilities	341,242	99,064
Deferred revenue, noncurrent	3,815	3,815
Operating lease liabilities, noncurrent	133,561	66,556
Contingent consideration, noncurrent	22,822	25,374
Deferred tax liability	18,439	3,253
Other long-term liabilities	2,540	3,847
TOTAL LIABILITIES	522,419	201,909
Commitments and contingencies (Note 9)
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of December 31, 2021 and 2020, respectively; no shares issued and outstanding as of December 31, 2021 and 2020	0	0
Common stock, $0.0001 par value; 300,000,000 shares authorized as of December 31, 2021 and 2020, respectively; 127,416,740 and 107,648,925 shares issued and outstanding as of December 31, 2021 and 2020, respectively	13	13
Additional paid-in capital	1,571,535	1,385,301
Accumulated other comprehensive loss	(1,099)	(1,278)
Accumulated deficit	(138,600)	(667,184)
TOTAL STOCKHOLDERS’ EQUITY	1,431,849	716,852
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,954,268	$ 918,761