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Trade Receivables (Tables)
12 Months Ended
Dec. 31, 2023
Receivables [Abstract]  
Summary of Receivables
Receivables from collaborations were as follows (in thousands):
 December 31, 2023
 BilledUnbilled Total
Royalty receivables from partners$— $2,296 $2,296 
Total receivables from collaborators$— $2,296 $2,296 
 December 31, 2022
 BilledUnbilledTotal
U.S. Department of Health and Human Services, net$7,218 $284 $7,502 
Royalty receivables from partners741 — 741 
Other collaborations— 25 25 
Total receivables from collaborators$7,959 $309 $8,268