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Stock-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Sep. 30, 2018
Chief Executive Officer [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost $ 20,000    
Options issued under stock option plans   55,000  
Long-Term Management Incentive Compensation Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares approved to be issued under plan 700,000    
Shares issued 102,183    
Compensation cost $ 100,000   $ 0
Long-Term Management Incentive Compensation Plan [Member] | 2018-2020 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost 800,000    
Long-Term Management Incentive Compensation Plan [Member] | 2019-2021 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost 500,000    
Long-Term Management Incentive Compensation Plan [Member] | 2020-2022 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost $ 300,000    
Long-Term Management Incentive Compensation Plan [Member] | 2017-2021 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance period 3 years    
Long-Term Management Incentive Compensation Plan [Member] | 2019-2022 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance period 3 years    
Stock Option Plans [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Period options are excercisable 10 years    
Shares available for future grants 0    
New Omnibus Stock Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares approved to be issued under plan 700,000    
Compensation cost     $ 300,000
Period options are excercisable 10 years    
Options issued under stock option plans     36,095
Shares available for future grants 184,030    
New Omnibus Stock Plan [Member] | Chief Executive Officer [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost $ 100,000    
Options issued under stock option plans 30,000    
New Omnibus Stock Plan [Member] | Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued 30,000    
New Omnibus Stock Plan [Member] | Chief Executive Officer [Member] | Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued 30,000    
New Omnibus Stock Plan [Member] | Chief Executive Officer [Member] | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued 3,186    
New Omnibus Stock Plan [Member] | Non-Executive Officers [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued 5,425   2,590
Compensation cost $ 100,000   $ 100,000
New Omnibus Stock Plan [Member] | Seven Executives [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost $ 800,000    
New Omnibus Stock Plan [Member] | Seven Executives [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued 167,760    
New Omnibus Stock Plan [Member] | Seven Executives [Member] | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued 10,382    
New Omnibus Stock Plan [Member] | Nine Executives [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost $ 100,000    
New Omnibus Stock Plan [Member] | Nine Executives [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance period 18 months    
Shares issued 43,929    
New Omnibus Stock Plan [Member] | Four Executives [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued 39,666    
Compensation cost $ 200,000