CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 86,317	$ 166,916
Marketable securities	348,905	338,193
Accounts receivable, net	6,119	3,824
Inventory	2,324	1,026
Prepaid expenses and other current assets	11,065	12,215
Total current assets	454,730	522,174
Property and equipment, net	8,377	8,724
Operating lease right-of-use assets	7,452	7,748
Intangible asset, net	96,587	98,558
Goodwill	6,234	6,234
Other non-current assets	7,584	7,692
Total assets	580,964	651,130
Current liabilities:
Accounts payable	11,964	11,945
Accrued and other current liabilities	30,749	54,964
Deferred revenue, current	5,297	5,318
Current portion of operating lease liabilities	1,621	1,688
Current portion of contingent consideration	8,900	8,800
Total current liabilities	58,531	82,715
Deferred revenue, noncurrent	5,664	5,479
Operating lease liabilities, net of current portion	9,937	10,314
Contingent consideration, net of current portion	34,100	33,600
Convertible senior notes	151,451	149,353
Total liabilities	259,683	281,461
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.001 par value; 10,000 shares authorized; none issued and outstanding	0	0
Common stock and additional paid-in capital, $0.001 par value: 100,000 shares authorized; 55,813 and 55,736 shares issued and outstanding at March 31, 2021 and December 31, 2020, respectively	1,701,788	1,694,580
Accumulated deficit	(1,380,470)	(1,324,840)
Accumulated other comprehensive loss	(37)	(71)
Total stockholders’ equity	321,281	369,669
Total liabilities and stockholders’ equity	$ 580,964	$ 651,130