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Restricted Stock Plan (Narrative) (Details) - USD ($)
3 Months Ended
Dec. 11, 2019
Mar. 31, 2020
May 31, 2018
Mar. 31, 2014
Mar. 31, 2010
Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted Stock vesting period 3 years        
Time-Based Restricted Stock [Member] | Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares awarded 10,038        
Fair value of shares awarded $ 122,062        
Market-Based Restricted Stock [Member] | Officer [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares awarded 15,058        
Fair value of shares awarded $ 160,401        
Time-Based, Market-Based and Performance-Based Shares [Member] | Officers and Directors [Member] | Scenario Forecast [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Additional expense   $ 430,000      
Additional expense non-recurring   $ 307,000      
Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Repurchase of common stock authorized     $ 1,500,000    
2010 Stock Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock authorized       500,000 200,000