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Shareholders' Equity (Stock Options) (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
May 31, 2009
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, percent vested on one year anniversary of grant 25.00%    
Options, monthly vesting percentage beginning after year one anniversary 2.083%    
Options, number of months vesting after one year anniversary 36    
Total intrinsic value of options exercised   $ 28 $ 256
Total intrinsic value of outstanding options   $ 323  
Stock Option Plans:      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, merit vesting period 3 years    
Stock Option Plans: | Minimum | 2006 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Plan modification, contractual life 6 years