Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Service Agreements Narrative (Details)

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Commitments and Contingencies - Service Agreements Narrative (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 06, 2015
Dec. 31, 2011
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
CTS Agreement            
Service Agreements            
Service agreement term 5 years          
License fee amount     $ 630 $ 454 $ 1,901 $ 1,193
Master Services Agreement For Clinical Research and Related Services            
Service Agreements            
Service agreement amount paid upon execution of agreement   $ 151        
Payments made under agreement     $ 362 $ 208 $ 794 $ 699