CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 139,083	$ 166,916
Marketable securities	254,199	338,193
Accounts receivable, net	7,702	3,824
Inventory	2,923	1,026
Prepaid expenses and other current assets	12,487	12,215
Total current assets	416,394	522,174
Property and equipment, net	7,985	8,724
Operating lease right-of-use assets	7,103	7,748
Intangible asset, net	94,615	98,558
Goodwill	6,234	6,234
Other non-current assets	7,742	7,692
Total assets	540,073	651,130
Current liabilities:
Accounts payable	10,831	11,945
Accrued and other current liabilities	42,774	54,964
Deferred revenue, current	4,953	5,318
Current portion of operating lease liabilities	1,783	1,688
Current portion of contingent consideration	9,000	8,800
Total current liabilities	69,341	82,715
Deferred revenue, noncurrent	4,742	5,479
Operating lease liabilities, net of current portion	9,496	10,314
Contingent consideration, net of current portion	30,000	33,600
Convertible senior notes	153,634	149,353
Total liabilities	267,213	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 55,891 and 55,736 shares issued and outstanding at June 30, 2021 and December 31, 2020, respectively	1,712,350	1,694,580
Accumulated deficit	(1,439,366)	(1,324,840)
Accumulated other comprehensive loss	(124)	(71)
Total stockholders’ equity	272,860	369,669
Total liabilities and stockholders’ equity	$ 540,073	$ 651,130
Common stock authorized (shares)	200,000,000	100,000,000