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Liability for Sale of Future Royalties (Tables)
6 Months Ended
Jun. 30, 2022
Liability for Sale of Future Royalties  
Research and Development Arrangement, Contract to Perform for Others [Line Items]  
Schedule of Changes to Liability

Changes to the liability for sale of future royalties were as follows for the six months ended June 30, 2022 (in thousands):
 

 

 

2022

 

Beginning balance, January 1

 

$

5,260

 

Cash received from BVF

 

 

5,000

 

Interest accretion

 

 

902

 

Ending balance, June 30

 

$

11,162