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Leases - Summary (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
USD ($)
item
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
item
Jun. 30, 2019
USD ($)
Leases        
Operating lease liability $ 468   $ 468  
Lease expense 121 $ 123 242 $ 245
Cash paid for amounts included in the measurement of lease liabilities for operating leases: $ 88   $ 174  
Weighted average remaining lease term in months 10 months   10 months  
Weighted average discount rate 2.75%   2.75%  
Corporate headquarters and main retail branch        
Leases        
Number of options to extend | item 1   1  
Extension term 5 years   5 years  
Option to extend lease term     true  
ROU asset $ 460   $ 460  
Operating lease liability $ 468   $ 468