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Leases - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]        
Right of use assets $ 483 $ 604 $ 451 $ 0
Operating lease, liability 483 604 451 $ 0
Operating lease, cost $ 217 $ 198    
Accounting Standards Update 2016-02        
Lessee, Lease, Description [Line Items]        
Right of use assets     451  
Operating lease, liability     $ 451  
Minimum        
Lessee, Lease, Description [Line Items]        
Remaining lease term 1 year      
Maximum        
Lessee, Lease, Description [Line Items]        
Remaining lease term 9 years