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NIH Contract - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Research and Development [Abstract]    
Maximum contract value   $ 34,000
Capital expenditures expected to be incurred $ 22,400  
Capital expenditures incurred 21,400  
Assets placed in service, gross 20,425 16,890
Construction-in-progress $ 937 $ 3,909