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Accrued Expenses
 12 Months Ended
Dec. 31, 2022
Payables and Accruals [Abstract]  
Accrued Expenses

7. Accrued Expenses

Accrued expenses consisted of the following:

 

 

 

December 31,

 

 

 

2022

 

 

2021

 

 

 

(in thousands)

 

External research and development

 

$

8,424

 

 

$

5,666

 

Payroll and employee related expenses

 

 

15,231

 

 

 

4,280

 

Manufacturing

 

 

4,596

 

 

 

—

 

Accrued consulting and other professional fees

 

 

4,116

 

 

 

2,820

 

Rebates and other GTN adjustments

 

 

3,582

 

 

 

—

 

Royalty payable

 

 

1,358

 

 

 

—

 

Other accrued expenses

 

 

1,005

 

 

 

258

 

Total accrued expenses

 

$

38,312

 

 

$

13,024