CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 97,984	$ 113,009
Marketable securities	70,917	58,742
Accounts receivable, net	67,608	94,163
Inventories	22,906	31,553
Prepaid and other current assets	23,959	19,100
Total current assets	283,374	316,567
Property and equipment, net	2,415	4,116
Goodwill	422,513	422,513
Intangible assets, net	1,973	23,620
Operating lease right-of-use asset	21,063	23,286
Deferred tax assets	0	630
Restricted cash	495	495
Other long-term assets	2,523	0
Total assets	734,356	791,227
Current liabilities:
Accounts payable	9,742	27,021
Accrued expenses	146,597	183,382
Current portion of deferred revenue	2,477	0
Current portion of operating lease liability	3,161	4,077
Current portion of acquisition-related contingent consideration	0	17
Total current liabilities	161,977	214,497
Long-term liabilities:
Convertible notes, net	289,334	277,034
Long-term operating lease liability	18,726	19,791
Long-term deferred revenue	7,662	0
Other long-term liabilities	635	89
Total liabilities	478,334	511,411
Commitments and contingencies (Note N)
Stockholders’ equity:
Preferred stock, par value $0.01 per share, 2,000,000 shares authorized; none issued	0	0
Common stock, par value $0.01 per share, 117,500,000 shares authorized; 34,503,435 and 33,999,081 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively	345	339
Additional paid-in capital	1,305,412	1,297,917
Accumulated other comprehensive loss	(3,068)	(3,239)
Accumulated deficit	(1,046,667)	(1,015,201)
Total stockholders’ equity	256,022	279,816
Total liabilities and stockholders’ equity	$ 734,356	$ 791,227