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)
12 Months Ended
Dec. 31, 2020
USD ($)
Segment
Dec. 31, 2019
USD ($)
Summary of Significant Accounting Policies [Line Items]    
Investments maturity year 2021  
Interest or penalties related to uncertain income tax benefits $ 0  
Number of operating segment | Segment 1  
Number of reportable segment | Segment 1  
Amounts due to related party $ 13,000 $ 36,000
Professional Services    
Summary of Significant Accounting Policies [Line Items]    
Costs incurred under the arrangement recorded as general and administrative expense $ 311,000 $ 601,000