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Collaborations (Tables)
 9 Months Ended
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Change in Accounts Receivable, Contract Asset and Liabilities

The following table presents the changes in accounts receivable, contract assets and contract liabilities for the nine months ended September 30, 2023 (in thousands):

 

 

 

Balance at
December 31,
2022

 

 

Additions

 

 

Deductions

 

 

Balance at
September 30,
2023

 

Accounts receivable and contract assets:

 

 

 

 

 

 

 

 

 

 

 

 

Billed receivables - Sanofi

 

$

—

 

 

$

9,979

 

 

$

(9,979

)

 

$

—

 

Unbilled receivables - Sanofi

 

 

2,537

 

 

 

11,220

 

 

 

(9,979

)

 

 

3,778

 

Total accounts receivable and contract assets

 

$

2,537

 

 

$

21,199

 

 

$

(19,958

)

 

$

3,778

 

Contract liabilities:

 

 

 

 

 

 

 

 

 

 

 

 

Deferred revenue - Vertex

 

$

8,399

 

 

$

—

 

 

$

(8,399

)

 

$

—

 

Deferred revenue - Sanofi

 

 

54,861

 

 

 

11,220

 

 

 

(22,308

)

 

 

43,773

 

Total contract liabilities

 

$

63,260

 

 

$

11,220

 

 

$

(30,707

)

 

$

43,773