Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 297,460	$ 62,070
Marketable securities	227,707	189,085
Accounts receivable, net	1,309	0
Inventory	1,010	0
Prepaid expenses and other current assets	12,905	11,084
Acquisition holdback placed in escrow	25,000	25,000
Total current assets	565,391	287,239
Property and equipment, net	9,050	9,424
Operating lease right-of-use assets	8,002	7,774
Intangible asset, net	100,529	102,500
Goodwill	6,234	6,234
Other noncurrent assets	2,840	1,079
Total assets	692,046	414,250
Current liabilities:
Accounts payable	7,223	7,979
Accrued and other current liabilities	31,882	30,117
Acquisition holdback liability	24,444	24,444
Deferred revenue, current	4,900	5,927
Current portion of operating lease liabilities	1,654	1,322
Current portion of contingent consideration	22,200	25,600
Total current liabilities	92,303	95,389
Deferred revenue, noncurrent	6,331	7,425
Operating lease liabilities, net of current portion	10,660	10,752
Contingent consideration, net of current portion	32,700	38,200
Convertible senior notes	127,960	0
Deferred tax liability	0	17,425
Total liabilities	269,954	169,191
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.001 par value; 100,000 shares authorized; and 55,673 and 45,272 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	56	45
Additional paid-in capital	1,676,408	1,360,092
Accumulated deficit	(1,254,670)	(1,115,457)
Accumulated other comprehensive income	298	379
Total stockholders’ equity	422,092	245,059
Total liabilities and stockholders’ equity	692,046	414,250
Convertible senior notes	$ 127,960	$ 0