CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Product sales	$ 358,564	$ 350,671	$ 338,319
Royalties, fees and other	19,425	17,783	16,566
Total revenues	377,989	368,454	354,885
Cost of product sales	116,264	107,951	103,314
Gross profit	261,725	260,503	251,571
Operating expenses:
Research and development	33,965	32,146	28,932
Sales and marketing	122,595	116,127	108,621
General and administrative	33,463	33,212	35,069
Amortization of intangible assets	1,996	4,857	5,291
Exit costs	695	(778)	8,300
Investigation and restatement-related costs	37,046	10,805	80,825
Total operating expenses	229,760	196,369	267,038
Income (loss) from operations	31,965	64,134	(15,467)
Other income, net	2,648	678	14
Interest expense and bank fees	(1,974)	(848)	(622)
Foreign exchange loss, net	(1,524)	(257)	(723)
Total other expense	(850)	(427)	(1,331)
Income (loss) from continuing operations before income taxes	31,115	63,707	(16,798)
Income tax provision (benefit)	5,059	17,329	(13,985)
Net income (loss) from continuing operations	26,056	46,378	(2,813)
Income from discontinued operations, net of taxes	0	0	1,911
Net income (loss)	26,056	46,378	(902)
Accrued dividend and accretion charges on Series A 3% Redeemable Convertible Preferred Stock	(3,735)	(3,575)	(3,416)
Net income (loss) attributable to common stockholders	22,321	42,803	(4,318)
Other comprehensive income
Foreign currency adjustments	(179)	685	369
Total comprehensive income (loss)	$ 25,877	$ 47,063	$ (533)
Weighted-average shares outstanding:
Basic (in shares)	28,311	27,752	27,382
Diluted (in shares)	28,988	28,407	27,382
Earnings (loss) per share from continuing operations attributable to common stockholders:
Basic (in dollars per share)	$ 0.65	$ 1.28	$ (0.23)
Diluted (in dollars per share)	$ 0.64	$ 1.25	$ (0.23)
Earnings (loss) per share attributable to common stockholders:
Basic (in dollars per share)	$ 0.65	$ 1.28	$ (0.16)
Diluted (in dollars per share)	$ 0.64	$ 1.25	$ (0.16)