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Operating Leases - Textual (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2020
USD ($)
ft²
Location
Dec. 31, 2019
Leases [Abstract]    
Lessee leasing agreements, operating leases, area under lease (in sqft) | ft² 37,829  
Number of office space locations | Location 1  
Operating lease expense excluding rent $ 0.4  
Operating Lease, Right-of-Use Asset 2.1  
Operating Lease, Liability $ 2.5  
Operating Lease, Liability, Statement of Financial Position [Extensible List] us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent