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Collaborations (Tables)
 6 Months Ended
Jun. 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 six months ended June 30, 2022 (in thousands):

 

 

 

Balance at
December 31,
2021

 

 

Additions

 

 

Deductions

 

 

Balance at
June 30,
2022

 

Accounts receivable and contract assets:

 

 

 

 

 

 

 

 

 

 

 

 

Billed receivables - Sanofi

 

$

—

 

 

$

1,398

 

 

$

(1,398

)

 

$

—

 

Unbilled receivables - Sanofi

 

 

135

 

 

 

3,633

 

 

 

(1,398

)

 

 

2,370

 

Total accounts receivable and contract assets

 

$

135

 

 

$

5,031

 

 

$

(2,796

)

 

$

2,370

 

Contract liabilities:

 

 

 

 

 

 

 

 

 

 

 

 

Deferred revenue - Vertex

 

$

19,212

 

 

$

—

 

 

$

(6,111

)

 

$

13,101

 

Deferred revenue - Sanofi

 

 

81,822

 

 

 

3,633

 

 

 

(15,025

)

 

 

70,430

 

Total contract liabilities

 

$

101,034

 

 

$

3,633

 

 

$

(21,136

)

 

$

83,531