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Leases (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Leases [Abstract]        
Lease terms extending through year     2024  
Operating lease, Weighted average remaining lease term 3 years 6 months   3 years 6 months  
Operating lease, Weighted average discount rate 6.58%   6.58%  
Operating lease costs $ 100 $ 93 $ 292 $ 310
Variable lease costs $ 59 $ 61 $ 187 $ 162