CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 150,461	$ 253,256
Marketable securities	110,583	140,915
Accounts receivable, net	83,183	75,347
Inventories	25,179	26,691
Prepaid and other current assets	24,549	18,961
Note receivable	0	10,000
Total current assets	393,955	525,170
Property and equipment, net	8,224	7,521
Goodwill	422,513	422,513
Intangible assets, net	191,789	217,033
Operating lease right-of-use asset	6,582
Deferred tax assets	630	1,260
Restricted cash	495	495
Other long-term assets	12	1,467
Total assets	1,024,200	1,175,459
Current liabilities:
Accounts payable	26,946	14,487
Accrued expenses	214,211	129,537
Current portion of convertible notes, net	0	21,276
Current portion of operating lease liability	3,889
Current portion of deferred revenue	1,128	0
Current portion of acquisition-related contingent consideration	128	144
Total current liabilities	246,302	165,444
Long-term liabilities:
Convertible notes, net	269,305	261,933
Long-term operating lease liability	3,504
Long-term deferred revenue	5,171	0
Long-term acquisition-related contingent consideration	183	215
Other long-term liabilities	228	1,212
Total liabilities	524,693	428,804
Commitments and contingencies (Note P)
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; 33,899,954 and 34,606,760 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	339	346
Additional paid-in capital	1,287,553	1,292,736
Accumulated other comprehensive loss	(3,032)	(3,985)
Accumulated deficit	(785,353)	(542,442)
Total stockholders’ equity	499,507	746,655
Total liabilities and stockholders’ equity	$ 1,024,200	$ 1,175,459