CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 89,884	$ 119,296
Investments	308,524	24,890
Accounts receivable, net	57,954	38,172
Inventories	34,363	40,610
Receivable from collaboration	5,615	4,518
Deferred tax assets	53,135	32,094
Prepaid and other current assets	6,004	14,456
Total current assets	555,479	274,036
Property and equipment, net	1,917	1,519
Goodwill	204,414	205,824
Intangible assets, net	863,020	887,908
Restricted cash	2,397	2,397
Other long-term assets	12,056	17,249
Total assets	1,639,283	1,388,933
Current liabilities:
Accounts payable	6,147	7,301
Accrued expenses	89,617	80,093
Current portion of long-term debt	132,680	34,000
Current portion of acquisition-related contingent consideration	95,526	718
Deferred revenues		44,376
Total current liabilities	323,970	166,488
Long-term liabilities:
Long-term debt, net	179,706	293,905
Convertible 2.5% senior notes, net	170,817	167,441
Acquisition-related contingent consideration	124,666	217,984
Deferred tax liabilities	122,303	77,619
Other long-term liabilities	4,840	5,543
Total liabilities	$ 926,302	$ 928,980
Commitments and contingencies
Stockholders' equity:
Preferred stock, par value $0.01 per share, 2,000,000 shares authorized; none issued
Common stock, par value $0.01 per share, 117,500,000 shares authorized at June 30, 2015 and 58,750,000 authorized at December 31, 2014; 30,868,011 and 25,599,550 shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively	$ 309	$ 256
Additional paid-in capital	1,000,901	793,757
Accumulated other comprehensive loss	(3,948)	(3,617)
Accumulated deficit	(284,281)	(330,443)
Total stockholders' equity	712,981	459,953
Total liabilities and stockholders' equity	$ 1,639,283	$ 1,388,933