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Leases, Right-of-Use Assets, Lease Liability, Lease Costs and Weighted Average Term and Discount Rate (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Lease Liabilities [Abstract]    
Operating lease liabilities $ 1,307 $ 1,307
Lease Cost [Abstract]    
Operating lease cost 85 170
Variable lease cost 21 44
Total lease cost $ 106 $ 214
Remaining Lease Term and Discount Rate [Abstract]    
Weighted average term (years) 6 years 3 months 11 days 6 years 3 months 11 days
Weighted average discount rate 3.13% 3.13%
Other Assets [Member]    
Right of Use Assets [Abstract]    
Operating lease right-of-use-assets $ 1,307 $ 1,307
Other Liabilities [Member]    
Lease Liabilities [Abstract]    
Operating lease liabilities $ 1,311 $ 1,311