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Intangible Assets (Narrative) (Details) - USD ($)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Intangible Assets, Net (Excluding Goodwill) [Abstract]    
Amortization expense, remainder of 2019 $ 82,000  
Amortization expense, 2020 139,000  
Amortization expense, 2021 65,000  
Amortization expense, 2022 13,000  
Amortization expense, 2023 9,000  
Amortization expense, 2024 2,000  
Impairment of intangible assets $ 0 $ 0