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Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Income Statement [Abstract]        
Product sales $ 81,061 $ 96,552 $ 259,030 $ 296,062
Marketing service fees 11,677 11,305 35,361 34,154
Net sales 92,738 107,857 294,391 330,216
Cost of sales 23,920 24,384 69,783 73,309
Gross profit 68,818 83,473 224,608 256,907
Operating expenses        
Sales and marketing 42,382 43,022 132,346 137,225
General and administrative 13,202 13,850 46,736 42,715
Research and development 6,361 6,858 20,653 23,160
Amortization of intangible assets 616 565 1,725 1,725
Costs related to the accounting review and restatement 2,664    2,664   
Impairment of goodwill 19,193    19,193  
Charges related to U.S. Government resolutions   373   1,059
Total operating expenses 84,418 64,668 223,317 205,884
Operating income (loss) (15,600) 18,805 1,291 51,023
Other income and expense        
Interest expense, net (555) (464) (1,585) (3,950)
Other income (expense), net (1,481) (1,021) 2,076 (992)
Total other income (expense) (2,036) (1,485) 491 (4,942)
Income (loss) before income taxes (17,636) 17,320 1,782 46,081
Income tax (expense) (448) (6,746) (8,126) (17,040)
Net income (loss) from continuing operations, net of tax (18,084) 10,574 (6,344) 29,041
Discontinued operations (Note 15)        
Gain on sale of Breg, Inc., net of tax   221   1,261
Loss from discontinued operations (3,041) (9,048) (16,629) (14,374)
Income tax benefit 1,303 3,269 5,334 5,749
Net loss from discontinued operations, net of tax (1,738) (5,558) (11,295) (7,364)
Net Income (loss) (19,822) 5,016 (17,639) 21,677
Net income (loss) per common share-basic:        
Net income (loss) from continuing operations, net of tax $ (1.00) $ 0.55 $ (0.34) $ 1.54
Net (loss) from discontinued operations, net of tax $ (0.10) $ (0.29) $ (0.60) $ (0.39)
Net income (loss) per common share-basic $ (1.10) $ 0.26 $ (0.94) $ 1.15
Net income (loss) per common share-diluted:        
Net income (loss) from continuing operations, net of tax $ (1.00) $ 0.54 $ (0.34) $ 1.51
Net (loss) from discontinued operations, net of tax $ (0.10) $ (0.29) $ (0.60) $ (0.38)
Net income (loss) per common share-diluted: $ (1.10) $ 0.25 $ (0.94) $ 1.13
Weighted average number of common shares:        
Basic 18,142,935 19,078,590 18,897,887 18,861,374
Diluted 18,142,935 19,533,021 18,897,887 19,300,263
Comprehensive income (loss) $ (16,064) $ 6,440 $ (17,426) $ 22,069