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Restatement of the Condensed Consolidated Financial Statements - Effects of Restatement on Condensed Consolidated Statement of Operations and Comprehensive Income (Loss) (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
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), net | 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 (loss) per common share- basic: |  |
Net income from continuing operations, net of tax | $ 0.39 | $ 0.46
Net (loss) income from discontinued operations, net of tax | $ (0.16) | $ 0.04
Net income per common share- basic | $ 0.23 | $ 0.50
Net income (loss) per common share- diluted: |  |
Net income from continuing operations, net of tax | $ 0.39 | $ 0.45
Net (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 (loss) income | 1,474 | 11,808
Previously Reported [Member] |  |
Product sales | 88,358 | 104,820
Marketing service fees | 11,896 | 11,222
Net sales | 100,254 | 116,042
Cost of sales | 22,699 | 21,940
Gross profit | 77,555 | 94,102
Operating expenses |  |
Sales and marketing | 48,839 | 49,521
General and administrative | 18,788 | 14,570
Research and development | 5,400 | 7,050
Amortization of intangible assets | 504 | 530
Charges related to US Government Resolutions |  |
Total operating expenses | 73,531 | 71,671
Operating income | 4,024 | 22,431
Other income and expense |  |
Interest expense, net | (560) | (2,221)
Other income (expense), net | 4,764 | (631)
Total other income (expense) | 4,204 | (2,852)
Income before income taxes | 8,228 | 19,579
Income tax expense | (3,320) | (7,363)
Net income from continuing operations, net of tax | 4,908 | 12,216
Discontinued operations (Note 16) |  |
(Loss) income from discontinued operations | (4,432) | (506)
Income tax benefit | 1,640 | 306
Net (loss) income from discontinued operations, net of tax | (2,792) | (200)
Net income | 2,116 | 12,016
Net income (loss) per common share- basic: |  |
Net income from continuing operations, net of tax | $ 0.25 | $ 0.65
Net (loss) income from discontinued operations, net of tax | $ (0.14) | $ (0.01)
Net income per common share- basic | $ 0.11 | $ 0.64
Net income (loss) per common share- diluted: |  |
Net income from continuing operations, net of tax | $ 0.25 | $ 0.64
Net (loss) income from discontinued operations, net of tax | $ (0.14) | $ (0.01)
Net income per common share- diluted | $ 0.11 | $ 0.63
Weighted average number of common shares: |  |
Basic | 19,431,093 | 18,675,694
Diluted | 19,691,141 | 19,116,195
Comprehensive (loss) income | (1,016) | 14,726
Adjustments [Member] |  |
Product sales | 2,978 | (7,212)
Marketing service fees | 141 | 106
Net sales | 3,119 | (7,106)
Cost of sales | 2,918 | (562)
Gross profit | 201 | (6,544)
Operating expenses |  |
Sales and marketing | (3,785) | (2,393)
General and administrative | (458) |
Research and development | 341 |
Amortization of intangible assets | 40 | 50
Charges related to US Government Resolutions |  | 310
Total operating expenses | (3,862) | (2,033)
Operating income | 4,063 | (4,511)
Other income and expense |  |
Income before income taxes | 4,063 | (4,511)
Income tax expense | (1,361) | 892
Net income from continuing operations, net of tax | 2,702 | (3,619)
Discontinued operations (Note 16) |  |
(Loss) income from discontinued operations | (2) | 1,033
Income tax benefit | (316) | (23)
Net (loss) income from discontinued operations, net of tax | (318) | 1,010
Net income | 2,384 | (2,609)
Net income (loss) per common share- basic: |  |
Net income from continuing operations, net of tax | $ 0.14 | $ (0.19)
Net (loss) income from discontinued operations, net of tax | $ (0.02) | $ 0.05
Net income per common share- basic | $ 0.12 | $ (0.14)
Net income (loss) per common share- diluted: |  |
Net income from continuing operations, net of tax | $ 0.14 | $ (0.19)
Net (loss) income from discontinued operations, net of tax | $ (0.02) | $ 0.05
Net income per common share- diluted | $ 0.12 | $ (0.14)
Weighted average number of common shares: |  |
Basic |  |
Diluted |  |
Comprehensive (loss) income | $ 2,490 | $ (2,918)

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