Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 214,841	$ 280,499
Accounts receivable	99,718	58,834
Inventories	84,708	65,674
Deferred tax assets, current portion, net	1,483	1,710
Income tax receivable, net	13,142	1,357
Prepaid expenses and other current assets	21,596	24,101
Total current assets	435,488	432,175
Property, plant and equipment, net	320,084	313,979
In process research and development	52,328	60,628
Intangible assets, net	62,110	58,344
Goodwill	52,585	52,585
Deferred tax assets, long-term portion, net	13,481	12,764
Other assets	7,247	8,216
Total assets	943,323	938,691
Current liabilities:
Accounts payable	41,824	40,930
Accrued expenses and other current liabilities	6,442	6,274
Accrued compensation	26,320	31,654
Contingent consideration, current portion	3,040	6,487
Provision for chargebacks	1,993	2,246
Deferred revenue	7,343	5,345
Total current liabilities	86,962	92,936
Contingent consideration, net of current portion	33,795	34,599
Long-term indebtedness	253,000	251,000
Deferred revenue, net of current portion	6,083	5,713
Other liabilities	1,232	1,242
Total liabilities	$ 381,072	$ 385,490
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value; 15,000,000 shares authorized, 0 shares issued and outstanding at both June 30, 2015 and December 31, 2014	$ 0	$ 0
Common stock, $0.001 par value; 100,000,000 shares authorized, 39,162,799 shares issued and 38,742,610 shares outstanding at June 30, 2015; 38,129,872 shares issued and 37,709,683shares outstanding at December 31, 2014	39	38
Treasury stock, at cost, 420,189 common shares at both June 30, 2015 and December 31, 2014	(6,320)	(6,320)
Additional paid-in capital	291,339	274,222
Accumulated other comprehensive loss	(3,657)	(3,008)
Retained earnings	280,850	288,269
Total stockholders' equity	562,251	553,201
Total liabilities and stockholders' equity	$ 943,323	$ 938,691