Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 119,296	$ 26,986
Investments	24,890	186,803
Accounts receivable, net	38,172	6,842
Inventories	40,610	17,217
Receivable from collaboration	4,518	278
Deferred tax assets	32,094
Prepaid and other current assets	14,456	3,396
Restricted cash		2,883
Total current assets	274,036	244,405
Property and equipment, net	1,519	1,846
Goodwill	205,824
Intangible assets, net	887,908	16,844
Restricted cash	2,397	400
Other long-term assets	17,249	1,964
Total assets	1,388,933	265,459
Current liabilities:
Accounts payable	7,301	2,629
Accrued expenses	80,811	22,266
Current portion of long-term debt	34,000
Deferred revenues	44,376	8,226
Total current liabilities	166,488	33,121
Long-term liabilities:
Long-term debt, net	293,905
Convertible 2.5% senior notes, net	167,441
Acquisition-related contingent consideration	217,984	13,609
Deferred income tax liability	77,619
Deferred revenues		44,534
Other long-term liabilities	5,543	1,787
Total liabilities	928,980	93,051
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, 58,750,000 shares authorized; 25,599,550 and 21,772,571 shares issued and outstanding at December 31, 2014 and 2013, respectively	256	218
Additional paid-in capital	793,757	641,941
Accumulated other comprehensive loss	(3,617)	(3,491)
Accumulated deficit	(330,443)	(466,260)
Total stockholders' equity	459,953	172,408
Total liabilities and stockholders' equity	$ 1,388,933	$ 265,459