CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 52,783	$ 488,668
Marketable securities	8,310	70,773
Restricted Cash (Note 14)	500,000
Accounts receivable, net	23,454	27,008
Receivables from collaborative partners	1,048	1,070
Inventories	6,455	8,456
Income taxes receivable	3,424	4,030
Deferred tax assets, net	9,601	9,601
Prepaid and other current assets	8,397	8,014
Total current assets	613,472	617,620
Marketable securities, long-term	6,641	6,961
Property and equipment, net	7,170	7,055
Intangible assets, net	69,822	72,361
Other assets	7,319	7,068
TOTAL ASSETS	704,424	711,065
Current liabilities:
Accounts payable and accrued liabilities	55,803	52,686
Income taxes payable	1,281
Contingent consideration liability	2,298
Other current liabilities	2,338	4,813
Total current liabilities	61,720	57,499
Contingent consideration liability	12,422	14,252
Convertible debt	233,057	229,891
Deferred tax liabilities, net, non-current	25,924	32,589
Other long-term liabilities	11,233	12,387
Commitments
Shareholders' equity:
Preferred stock
Common stock	246,034	239,961
Additional paid-in capital	77,968	76,809
Retained earnings	36,081	47,714
Accumulated other comprehensive loss, net of tax	(15)	(37)
Total shareholders' equity	360,068	364,447
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 704,424	$ 711,065