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Collaboration and License Agreements (Tables)
 12 Months Ended
Dec. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]  
Schedule of Reconciliation of Deferred Revenue

A reconciliation of deferred revenue related to the Falk and Takeda agreements for the years ended December 31, 2021 and 2020 is as follows (in thousands):

 

 

 

Takeda

Agreement

 

 

Falk

Agreement

 

 

Total

 

Balance at December 31, 2019

 

$

1,542

 

 

$

—

 

 

$

1,542

 

Amounts received

 

 

960

 

 

 

5,200

 

 

 

6,160

 

Revenue recognized

 

 

(792

)

 

 

(437

)

 

 

(1,229

)

Balance at December 31, 2020

 

 

1,710

 

 

 

4,763

 

 

 

6,473

 

Amounts received/credited

 

 

(150

)

 

 

16,678

 

 

 

16,528

 

Revenue recognized

 

 

(379

)

 

 

(2,750

)

 

 

(3,129

)

Balance at December 31, 2021

 

$

1,181

 

 

$

18,691

 

 

$

19,872