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Schedule of Accrued Liabilities (Detail) (USD $) | Sep. 30, 2013 | Dec. 31, 2012
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Schedule of Accrued Liabilities [Line Items] |  |
Employee compensation | $ 2,680,016 | $ 3,634,839
Taxes | 1,618,850 | 396,499
Contingent consideration | 1,161,953 | 1,376,877
Royalty and license fees | 1,153,469 | 1,459,680
Professional fees | 394,563 | 418,800
Research and development | 167,000 | 18,300
Unearned revenue | 1,909 | 599,120
Other accrued expenses | 676,969 | 393,875
Total | $ 7,854,729 | $ 8,297,990

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