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Collaborations (Tables)
 9 Months Ended
Sep. 30, 2022
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, 2022 (in thousands):

 

 

 

Balance at
December 31,
2021

 

 

Additions

 

 

Deductions

 

 

Balance at
September 30,
2022

 

Accounts receivable and contract assets:

 

 

 

 

 

 

 

 

 

 

 

 

Billed receivables - Sanofi

 

$

—

 

 

$

3,768

 

 

$

(3,768

)

 

$

—

 

Unbilled receivables - Sanofi

 

 

135

 

 

 

6,515

 

 

 

(3,768

)

 

 

2,882

 

Total accounts receivable and contract assets

 

$

135

 

 

$

10,283

 

 

$

(7,536

)

 

$

2,882

 

Contract liabilities:

 

 

 

 

 

 

 

 

 

 

 

 

Deferred revenue - Vertex

 

$

19,212

 

 

$

—

 

 

$

(8,608

)

 

$

10,604

 

Deferred revenue - Sanofi

 

 

81,822

 

 

 

6,515

 

 

 

(22,079

)

 

 

66,258

 

Total contract liabilities

 

$

101,034

 

 

$

6,515

 

 

$

(30,687

)

 

$

76,862