Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 216,515	$ 280,499
Accounts receivable	64,059	58,834
Inventories	82,134	65,674
Deferred tax assets, current portion, net	1,656	1,710
Income tax receivable, net	17,023	1,357
Prepaid expenses and other current assets	24,424	24,101
Total current assets	405,811	432,175
Property, plant and equipment, net	315,489	313,979
In process research and development	77,800	77,800
Intangible assets, net	56,202	58,344
Goodwill	41,984	41,984
Deferred tax assets, long-term portion, net	12,863	12,764
Other assets	7,696	8,216
Total assets	917,845	945,262
Current liabilities:
Accounts payable	40,583	40,930
Accrued expenses and other current liabilities	4,606	6,274
Accrued compensation	20,818	31,654
Contingent consideration, current portion	6,860	6,487
Provision for chargebacks	2,164	2,246
Deferred revenue	5,266	5,345
Total current liabilities	80,297	92,936
Contingent consideration, net of current portion	41,594	41,170
Long-term indebtedness	251,000	251,000
Deferred revenue, net of current portion	5,806	5,713
Other liabilities	1,270	1,242
Total liabilities	379,967	392,061
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value; 15,000,000 shares authorized, 0 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively	0	0
Common stock, $0.001 par value; 100,000,000 shares authorized, 38,745,536 shares issued and 38,325,347 shares outstanding at March 31, 2015; 38,129,872 shares issued and 37,709,683shares outstanding at December 31, 2014	38	38
Treasury stock, at cost, 420,189 common shares at both March 31, 2015 and December 31, 2014	(6,320)	(6,320)
Additional paid-in capital	280,653	274,222
Accumulated other comprehensive loss	(3,242)	(3,008)
Retained earnings	266,749	288,269
Total stockholders' equity	537,878	553,201
Total liabilities and stockholders' equity	$ 917,845	$ 945,262