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Summary of Significant Accounting Policies - Operating Leases (Details)
Dec. 31, 2020
Dec. 31, 2019
Operating Leased Assets [Line Items]    
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:OtherAssets  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:LiabilitiesCurrentAbstract us-gaap:LiabilitiesCurrentAbstract
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent us-gaap:OtherLiabilitiesNoncurrent
Minimum    
Operating Leased Assets [Line Items]    
Term of lease contract 3 years  
Maximum    
Operating Leased Assets [Line Items]    
Term of lease contract 5 years