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License and Collaboration Agreements (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended
Jul. 19, 2019
Mar. 31, 2021
Mayo Agreement [Member]    
Amount paid in license agreement   $ 200
Zurich Agreement [Member]    
Amount paid in license agreement $ 100  
Zurich Agreement [Member] | Research And Development Expense [Member]    
Amount paid in license agreement   $ 100