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Prepaid and Other Current Assets
 6 Months Ended
Jun. 30, 2024
Prepaid Expense and Other Assets, Current [Abstract]  
Prepaid and Other Current Assets

5. Prepaid and Other Current Assets

 

Prepaid and other current assets consisted of the following as of June 30, 2024 and December 31, 2023 (in thousands):

 

 

 

June 30,

 

 

December 31,

 

 

 

2024

 

 

2023

 

Down payments for inventory

 

$

9,411

 

 

$

16,296

 

Prepaid research and development

 

 

7,787

 

 

 

13,931

 

Other prepaid expenses

 

 

11,773

 

 

 

8,593

 

Total prepaid expenses

 

$

28,971

 

 

$

38,820

 

 

 

 

June 30,

 

 

December 31,

 

 

 

2024

 

 

2023

 

Royalties receivable

 

$

4,418

 

 

$

3,054

 

Receivable from collaboration agreement (1)

 

 

—

 

 

 

15,000

 

Deposits and other current assets

 

 

7,954

 

 

 

4,354

 

Total other current assets

 

$

12,372

 

 

$

22,408

 

 

(1) In January 2024, the Company waived the remaining reimbursement payment of $15.0 million from Sobi in connection with the decision to discontinue the cold agglutinin disease (“CAD”) program.