Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 136,871	$ 62,070
Marketable securities	253,378	189,085
Inventory, net	475	0
Prepaid expenses and other current assets	10,833	11,084
Acquisition holdback placed in escrow	25,000	25,000
Total current assets	426,557	287,239
Property and equipment, net	9,300	9,424
Operating lease right-of-use assets	8,266	7,774
Intangible assets	102,500	102,500
Goodwill	6,234	6,234
Other noncurrent assets	2,250	1,079
Total assets	555,107	414,250
Current liabilities:
Accounts payable	8,518	7,979
Accrued and other current liabilities	40,176	30,117
Acquisition holdback liability	24,444	24,444
Deferred revenue, current	5,303	5,927
Current portion of operating lease liabilities	1,633	1,322
Current portion of contingent consideration	13,000	25,600
Total current liabilities	93,074	95,389
Deferred revenue, noncurrent	5,768	7,425
Operating lease liabilities, net of current portion	11,022	10,752
Contingent consideration, net of current portion	40,100	38,200
Deferred tax liability	0	17,425
Total liabilities	149,964	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 55,445 and 45,272 shares issued and outstanding at June 30, 2020 and December 31, 2019, respectively	55	45
Additional paid-in capital	1,599,047	1,360,092
Accumulated deficit	(1,194,581)	(1,115,457)
Accumulated other comprehensive income	622	379
Total stockholders’ equity	405,143	245,059
Total liabilities and stockholders’ equity	$ 555,107	$ 414,250