CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Product sales	$ 87,060	$ 82,602	$ 262,008	$ 258,448
Royalties, fees and other	4,803	4,338	14,273	13,070
Total revenues	91,863	86,940	276,281	271,518
Cost of product sales	28,876	26,204	85,929	80,210
Gross profit	62,987	60,736	190,352	191,308
Operating expenses:
Research and development	8,433	8,184	25,536	23,677
Sales and marketing	29,322	27,175	89,872	86,217
General and administrative	8,785	8,191	24,926	24,833
Amortization of intangible assets	534	1,363	1,461	4,000
Exit costs	0	0	0	(778)
Investigation and restatement related costs	3,164	2,139	33,391	4,363
Total operating expenses	50,238	47,052	175,186	142,312
Income from operations	12,749	13,684	15,166	48,996
Non-operating gains (losses)	(28)	183	101	(578)
Income before income taxes	12,721	13,867	15,267	48,418
Income tax provision	2,449	3,882	587	13,211
Net income	10,272	9,985	14,680	35,207
Accrued dividend and accretion charges on Series A 3% Redeemable Convertible Preferred Stock	(940)	(900)	(2,788)	(2,666)
Net income available to common stockholders	9,332	9,085	11,892	32,541
Other comprehensive income (loss)
Foreign currency translation adjustments	1,131	951	(312)	565
Total comprehensive income	$ 11,403	$ 10,936	$ 14,368	$ 35,772
Weighted average shares outstanding:
Basic (in shares)	28,374	27,714	28,239	27,698
Diluted (in shares)	28,968	28,087	28,888	28,096
Earnings per share applicable to common stockholders:
Basic (in dollars per share)	$ 0.27	$ 0.27	$ 0.35	$ 0.97
Diluted (in dollars per share)	$ 0.27	$ 0.27	$ 0.34	$ 0.96