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Other Operating Income (Tables)
 9 Months Ended
Sep. 30, 2021
Other Income and Expenses [Abstract]  
Components of other operating income by category
The following table sets forth the components of other operating income by category:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2021202020212020
Other operating income by category:(in thousands)
Funding income from BARDA (as defined below)$644 $1,607 $3,974 $7,715 
Research and development tax credits3,815 2,559 11,698 6,900 
Grant income from CARB-X (as defined below)351 143 707 334 
$4,810 $4,309 $16,379 $14,949