CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 231,737	$ 192,114
Marketable securities	138,820	136,593
Accounts receivable, net	99,945	103,501
Inventories	31,598	37,356
Prepaid and other current assets	16,345	12,304
Total current assets	518,445	481,868
Property, plant and equipment, net	25,921	25,996
Goodwill	639,484	639,484
Intangible assets, net	648,206	704,470
Restricted cash	656	656
Other long-term assets	2,238	762
Total assets	1,834,950	1,853,236
Current liabilities:
Accounts payable	17,371	10,335
Accrued expenses	199,071	175,490
Current portion of convertible notes, net	20,460	0
Current portion of acquisition-related contingent consideration	50,007	49,399
Deferred revenues	42,510	42,494
Total current liabilities	329,419	277,718
Long-term liabilities:
Long-term debt, net	466,595	466,291
Convertible notes, net	251,508	268,392
Acquisition-related contingent consideration	660	686
Deferred tax liabilities	17,497	23,927
Deferred revenues	27,398	24,387
Other long-term liabilities	1,878	1,591
Total liabilities	1,094,955	1,062,992
Commitments and contingencies
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; 34,322,193 and 34,083,112 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	343	341
Additional paid-in capital	1,274,935	1,271,628
Accumulated other comprehensive loss	(4,362)	(3,908)
Accumulated deficit	(530,921)	(477,817)
Total stockholders’ equity	739,995	790,244
Total liabilities and stockholders’ equity	$ 1,834,950	$ 1,853,236