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License and Collaboration Agreement (Tables)
 6 Months Ended
Jun. 30, 2021
License And Collaboration Agreement [Abstract]  
Summary of Changes in Contract Liabilities

The following table presents changes in the Company’s contract liabilities for the periods presented (in thousands):

 

 

 

December 31,

 

 

 

 

 

 

 

 

 

 

June 30,

 

Six Months Ended June 30, 2021

 

2020

 

 

Additions

 

 

Deductions

 

 

2021

 

Contract liabilities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Deferred revenue

 

$

—

 

 

$

21,500

 

 

$

(13,696

)

 

$

7,804