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Accrued Expenses (Tables)
 12 Months Ended
Dec. 31, 2020
Payables And Accruals [Abstract]  
Schedule of Accrued Expenses

Accrued expenses consist of the following (in thousands):

 

 

 

As of December 31,

 

 

 

2020

 

 

2019

 

Payroll and employee-related costs

 

$

22,402

 

 

$

15,229

 

Research costs

 

 

21,684

 

 

 

9,434

 

Licensing fees

 

 

1,401

 

 

 

750

 

Professional fees

 

 

1,670

 

 

 

2,040

 

Intellectual property costs

 

 

3,625

 

 

 

2,311

 

Accrued property and equipment

 

 

2,835

 

 

 

407

 

Other

 

 

165

 

 

 

9

 

Total

 

$

53,782

 

 

$

30,180