Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.20.4
Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]      
Impairment losses $ 0    
Reduction of research and development expenses 58,000 $ 635,000 $ 5,000
Research and development tax credit receivable 766,000 $ 642,000  
Interest charges or penalties related to unrecognized tax benefits $ 0    
ASU 2016-02      
Summary Of Significant Accounting Policies [Line Items]      
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jan. 01, 2019    
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true    
Furniture, Laboratory and Office Equipment | Minimum      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of the assets 5 years    
Furniture, Laboratory and Office Equipment | Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of the assets 7 years    
Computer Equipment      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of the assets 3 years    
Australia      
Summary Of Significant Accounting Policies [Line Items]      
Concentrations of credit risk $ 100,000