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Third Party Agreements (Tables)
 12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of Change in Company's Contract Liabilities

As of December 31, 2023 and 2022, there were no contract assets related to the Regeneron Agreement. The following tables present changes in the Company’s contract liabilities for the years ended December 31, 2023 and 2022 (in thousands):

 

Twelve Months Ended December 31, 2023

 

Balance at
Beginning
of Period

 

 

Deductions

 

 

Balance at
End of Period

 

Contract liability

 

$

—

 

 

$

—

 

 

$

—

 

 

Twelve Months Ended December 31, 2022

 

Balance at
Beginning
of Period

 

 

Deductions
(1)

 

 

Balance at
End of Period

 

Contract liability

 

$

4,805

 

 

$

(4,805

)

 

$

—

 

 

Deductions to contract liabilities relate to deferred revenue recognized as revenue during the reporting period.