CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 54,455	$ 113,009
Marketable securities	70,288	58,742
Accounts receivable, net	106,484	94,163
Inventories	33,676	31,553
Prepaid and other current assets	25,734	19,100
Total current assets	290,637	316,567
Property and equipment, net	3,312	4,116
Goodwill	422,513	422,513
Intangible assets, net	13,783	23,620
Operating lease right-of-use asset	22,835	23,286
Deferred tax assets	0	630
Restricted cash	495	495
Total assets	753,575	791,227
Current liabilities:
Accounts payable	16,520	27,021
Accrued expenses	167,661	177,079
Current portion of operating lease liability	4,065	4,077
Current portion of acquisition-related contingent consideration	0	17
Total current liabilities	188,246	208,194
Long-term liabilities:
Convertible notes, net	281,038	277,034
Long-term operating lease liability	19,433	19,791
Other long-term liabilities	1,120	89
Total liabilities	489,837	505,108
Commitments and contingencies (Note O)
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; 34,266,256 and 33,999,081 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	342	339
Additional paid-in capital	1,300,572	1,297,917
Accumulated other comprehensive loss	(3,787)	(3,239)
Accumulated deficit	(1,033,389)	(1,008,898)
Total stockholders’ equity	263,738	286,119
Total liabilities and stockholders’ equity	$ 753,575	$ 791,227