Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 462,521	$ 109,335
Short-term investments	364,074	274,101
Restricted cash and cash equivalents, current	9,363	6,181
Prepaid expenses and other current assets	13,614	13,378
Total current assets	849,572	402,995
Intangible assets, net	33,944	35,694
Goodwill	16,937	16,937
Property and equipment, net	16,948	16,308
Operating right-of-use assets	14,762
Restricted cash and cash equivalents, noncurrent	1,201	7,300
Long-term investments		24,290
Other assets	9,895	8,547
TOTAL ASSETS	943,259	512,071
CURRENT LIABILITIES:
Accounts payable	6,796	5,881
Accrued and other liabilities	44,339	26,495
Deferred revenue, current portion	5,563	6,181
Contingent consideration, current portion	20,300	8,200
Derivative liability		12,449
Total current liabilities	76,998	59,206
Deferred revenue, noncurrent	3,815	12,670
Operating lease liabilities, noncurrent	12,092
Contingent consideration, noncurrent	31,712	9,380
Deferred tax liability	3,305	3,305
Other long-term liabilities	2,982	3,568
TOTAL LIABILITIES	130,904	88,129
Commitments and contingencies (Note 9)
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized as of September 30, 2020 and December 31, 2019; no shares issued and outstanding as of September 30, 2020 and December 31, 2019
Common stock, $0.0001 par value; 300,000,000 shares authorized as of September 30, 2020 and December 31, 2019; 126,991,631 and 107,648,925 shares issued and outstanding as of September 30, 2020 and December 31, 2019, respectively	13	11
Additional paid-in capital	1,374,362	793,051
Accumulated other comprehensive loss	(485)	(601)
Accumulated deficit	(561,535)	(368,519)
TOTAL STOCKHOLDERS’ EQUITY	812,355	423,942
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 943,259	$ 512,071