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Accounts payable and accrued expenses | 12 Months Ended
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Dec. 31, 2021
Payables and Accruals [Abstract] |
Accounts payable and accrued expenses | 7. Accounts payable and accrued expenses Accounts payable and accrued expenses at December 31, 2021 and 2020 consist of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ | ​ | 2021 |  | 2020
Employee compensation, benefits, and related accruals | ​ | $ | 55,733 | ​ | $ | 53,291
Income tax payable | ​ | ​ | 1,287 | ​ | ​ | 4,315
Consulting and contracted research | ​ |  | 26,434 | ​ |  | 18,250
Professional fees | ​ |  | 3,547 | ​ |  | 3,614
Sales allowance | ​ |  | 61,662 | ​ |  | 54,327
Sales rebates | ​ |  | 68,770 | ​ |  | 63,774
Royalties | ​ | ​ | 35,679 | ​ | ​ | 16,575
Accounts payable | ​ |  | 23,033 | ​ |  | 18,665
Other | ​ |  | 12,639 | ​ |  | 9,357
Total | ​ | $ | 288,784 | ​ | $ | 242,168
​

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- Definition The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as current at the end of the reporting period. + References No definition available. + Details
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