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Shareholders' Equity and Debt (Shareholders' Equity) (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Nov. 30, 2017
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Jan. 31, 2016
May 13, 2010
Shareholders' Equity (Textual) [Abstract]                  
Repurchase outstanding common shares               $ 10,000,000 $ 10,000,000
Repurchase of shares, value   $ (484,965) $ (303,088) $ (769,648) $ (441,624)        
Shelf Registration, sale of corporate securities (up to) $ 100,000,000                
Restricted Stock                  
Shareholders' Equity (Textual) [Abstract]                  
Restricted stock granted in period, shares           36,850 229,141    
Incentive Stock Options                  
Shareholders' Equity (Textual) [Abstract]                  
Restricted stock granted in period, shares           173,350      
Director | Restricted Stock                  
Shareholders' Equity (Textual) [Abstract]                  
Restricted stock awards, vesting period           1 year      
Common stock                  
Shareholders' Equity (Textual) [Abstract]                  
Repurchase of shares (in shares)   158,405 91,724 141,463 164,866 250,129 306,329    
Repurchase of shares, value   $ (484,965) $ (303,088) $ (769,648) $ (441,624) $ (800,000) $ (1,200,000)