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Accounts payable and accrued expenses
12 Months Ended
Dec. 31, 2022
Payables and Accruals [Abstract]  
Accounts payable and accrued expenses

7. Accounts payable and accrued expenses

Accounts payable and accrued expenses at December 31, 2022 and 2021 consist of the following:

December 31, 

2022

    

2021

Employee compensation, benefits, and related accruals

$

62,669

$

55,733

Income tax payable

4,712

1,287

Consulting and contracted research

 

38,882

 

26,434

Professional fees

 

3,093

 

3,547

Sales allowance

 

63,787

 

61,662

Sales rebates

 

67,355

 

68,770

Royalties

40,546

35,679

Accounts payable

 

27,268

 

23,033

Other

 

12,054

 

12,639

Total

$

320,366

$

288,784