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Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Income Statement [Abstract]    
Product sales $ 91,336 $ 97,608
Marketing service fees 12,037 11,328
Net sales 103,373 108,936
Cost of sales 25,617 21,378
Gross profit 77,756 87,558
Operating expenses    
Sales and marketing 45,054 47,128
General and administrative 18,330 14,570
Research and development 5,741 7,050
Amortization of intangible assets 544 580
Charges related to US Government Resolutions    310
Total operating expenses 69,669 69,638
Operating income 8,087 17,920
Other income and expense    
Interest expense, net (560) (2,221)
Other income (expense) 4,764 (631)
Total other income (expense) 4,204 (2,852)
Income before income taxes 12,291 15,068
Income tax expense (4,681) (6,471)
Net income from continuing operations, net of tax 7,610 8,597
Discontinued operations (Note 16)    
(Loss) income from discontinued operations (4,434) 527
Income tax benefit 1,324 283
Net (loss) income from discontinued operations, net of tax (3,110) 810
Net income 4,500 9,407
Net income per common share- basic:    
Net income from continuing operations, net of tax $ 0.39 $ 0.46
(loss) income from discontinued operations, net of tax $ (0.16) $ 0.04
Net income per common share- basic $ 0.23 $ 0.50
Net income per common share- diluted:    
Net income from continuing operations, net of tax $ 0.39 $ 0.45
(loss) income from discontinued operations, net of tax $ (0.16) $ 0.04
Net income per common share- diluted $ 0.23 $ 0.49
Weighted average number of common shares:    
Basic 19,431,093 18,675,694
Diluted 19,691,141 19,116,195
Comprehensive income $ 1,474 $ 11,808