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RADx Program (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 28, 2020
Dec. 31, 2019
Research and Development [Abstract]      
Maximum contract value   $ 34,000  
Percentage of contractual amount to be paid on liquidated damages 33.00%    
Period due to pay liquidation damages 6 months    
Total value of milestones reasonably assured $ 18,607    
Amounts applied against research and development expenses 383    
Deferred grant income 18,224   $ 0
Funding received 11,151    
Grant receivable from RADx $ 7,456   $ 0