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Organization and Nature of the Business - Additional Information (Details)
$ in Thousands
9 Months Ended
Sep. 15, 2020
Sep. 15, 2020
Sep. 30, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Schedule Of Equity Method Investments [Line Items]        
Entity incorporation date     Nov. 30, 2014  
Entity date of merger     Apr. 28, 2020  
Equity method investment, Ownership percentage     25.00%  
Reverse stock split 1-for-7 1-for-7    
Exchange ratio 0.1240      
Common stock, shares outstanding | shares     19,589,637 2,155,578
Accumulated deficit     $ (97,367) $ (69,647)
Adicet Therapeutics [Member]        
Schedule Of Equity Method Investments [Line Items]        
Equity method investment, Ownership percentage     75.00%  
Common stock, shares outstanding | shares     19,589,828  
Cash, cash equivalents and marketable securities     $ 108,100  
Accumulated deficit     $ 97,400