CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 106,138	$ 166,916
Marketable securities	236,886	338,193
Accounts receivable, net	9,486	3,824
Inventory	3,502	1,026
Prepaid expenses	13,950	7,279
Other current assets	5,500	4,936
Total current assets	375,462	522,174
Property and equipment, net	7,593	8,724
Operating lease right-of-use assets	6,862	7,748
Intangible asset, net	92,644	98,558
Goodwill	6,234	6,234
Other non-current assets	8,192	7,692
Total assets	496,987	651,130
Current liabilities:
Accounts payable	12,113	11,945
Accrued and other current liabilities	46,111	54,964
Deferred revenue, current	5,048	5,318
Current portion of operating lease liabilities	1,654	1,688
Current portion of contingent consideration	13,500	8,800
Total current liabilities	78,426	82,715
Deferred revenue, noncurrent	3,436	5,479
Operating lease liabilities, net of current portion	9,055	10,314
Contingent consideration, net of current portion	25,900	33,600
Convertible senior notes	155,871	149,353
Total liabilities	272,688	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: 200,000 and 100,000 shares authorized and 55,935 and 55,736 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	1,721,694	1,694,580
Accumulated deficit	(1,497,370)	(1,324,840)
Accumulated other comprehensive loss	(25)	(71)
Total stockholders’ equity	224,299	369,669
Total liabilities and stockholders’ equity	$ 496,987	$ 651,130