Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 269,975	$ 62,070
Marketable securities	150,218	189,085
Other receivable	19,741	0
Prepaid expenses and other current assets	13,647	11,084
Acquisition holdback placed in escrow	25,000	25,000
Total current assets	478,581	287,239
Property and equipment, net	9,560	9,424
Operating lease right-of-use assets	8,546	7,774
Indefinite-lived intangible assets	102,500	102,500
Goodwill	6,234	6,234
Other noncurrent assets	1,485	1,079
Total assets	606,906	414,250
Current liabilities:
Accounts payable	7,887	7,979
Accrued and other current liabilities	25,803	30,117
Acquisition holdback liability	24,444	24,444
Deferred revenue, current	5,696	5,927
Current portion of operating lease liabilities	1,383	1,322
Current portion of contingent consideration	23,600	25,600
Total current liabilities	88,813	95,389
Deferred revenue, noncurrent	6,407	7,425
Operating lease liabilities, net of current portion	11,454	10,752
Contingent consideration, net of current portion	32,300	38,200
Deferred income taxes	17,425	17,425
Total liabilities	156,399	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 55,341 and 45,272 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	55	45
Additional paid-in capital	1,591,497	1,360,092
Accumulated deficit	(1,141,257)	(1,115,457)
Accumulated other comprehensive income	212	379
Total stockholders’ equity	450,507	245,059
Total liabilities and stockholders’ equity	$ 606,906	$ 414,250