Annual report pursuant to Section 13 and 15(d)

Basis of Presentation and Significant Accounting Policies - Leases (Details)

v3.20.4
Basis of Presentation and Significant Accounting Policies - Leases (Details) - USD ($)
$ in Thousands
Jan. 01, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies        
Lease, Practical Expedients, Package true      
Operating lease right-of-use assets   $ 359 $ 510  
Operating lease liabilities   $ 408    
ASC 842        
Accounting Policies        
Change in Accounting Principle, Accounting Standards Update, Adopted true      
ASC 842 | Cumulative Effect, Period of Adoption, Adjustment        
Accounting Policies        
Operating lease right-of-use assets       $ 7,400
Operating lease liabilities       $ 9,200