Quarterly report pursuant to Section 13 or 15(d)

Licensing and Other Arrangements - NIAID (Details)

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Licensing and Other Arrangements - NIAID (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Sep. 30, 2008
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2017
Dec. 31, 2014
Licensing and other arrangements            
Revenue recognized   $ 19 $ 500      
Arrangement with Governmental Agency | NIAID            
Licensing and other arrangements            
Total contract amount awarded $ 64,800          
Contractual term 3 years          
Accounts receivable           $ 400
Deferred revenue/Contract liabilities   $ 1,400   $ 1,400   $ 800
Accounts receivable written off         $ 400  
Estimated refund liability       1,400    
Revenue recognized       $ (600)