Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 312,795	$ 280,499
Accounts receivable	120,767	58,834
Inventories	76,936	65,674
Deferred tax assets, net	0	1,710
Income tax receivable, net	6,573	1,357
Prepaid expenses and other current assets	21,541	24,101
Total current assets	538,612	432,175
Property, plant and equipment, net	331,856	313,979
In-process research and development	42,501	60,628
Intangible assets, net	57,375	58,344
Goodwill, net book value	54,902	52,585
Deferred tax assets, net	11,286	12,764
Other assets	7,060	8,216
Total assets	1,043,592	938,691
Current liabilities:
Accounts payable	45,966	40,930
Accrued expenses and other current liabilities	6,229	6,274
Accrued compensation	34,683	31,654
Contingent purchase consideration, current portion	2,553	6,487
Provision for chargebacks	2,238	2,246
Short-term deferred revenue	7,942	5,345
Total current liabilities	99,611	92,936
Contingent purchase consideration, net of current portion	23,046	34,599
Long-term indebtedness, net of current portion	253,000	251,000
Deferred revenue, net of current portion	6,590	5,713
Other liabilities	1,328	1,242
Total liabilities	$ 383,575	$ 385,490
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value; 15,000,000 shares authorized, 0 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively	$ 0	$ 0
Common stock, $0.001 par value; 100,000,000 shares authorized, 39,829,408 shares issued and 39,406,578, shares outstanding at December 31, 2015; 38,129,872 shares issued and 37,709,683 shares outstanding at December 31, 2014	40	38
Treasury stock, at cost, 422,830 and 420,189 common shares at December 31, 2015 and 2014, respectively	(6,420)	(6,320)
Additional paid-in capital	317,971	274,222
Accumulated other comprehensive loss	(2,713)	(3,008)
Retained earnings	351,139	288,269
Total stockholders' equity	660,017	553,201
Total liabilities and stockholders' equity	$ 1,043,592	$ 938,691