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Shareholders' Equity (Intrinsic Value of Stock Options) (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Stockholders' Equity Note [Abstract]    
Aggregate intrinsic value of options outstanding $ 593 $ 835
Aggregate intrinsic value of options exercisable 593 835
Total intrinsic value of options exercised $ 28 $ 67