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Shareholders' Equity and Debt (Shareholders' Equity) (Details) - USD ($)
1 Months Ended 3 Months Ended
Nov. 30, 2017
Mar. 31, 2021
Mar. 31, 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   $ (303,088) $ (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   35,850 229,141    
Incentive Stock Options          
Shareholders' Equity (Textual) [Abstract]          
Restricted stock granted in period, shares   172,350      
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)   91,724 164,866    
Repurchase of shares, value   $ (303,088) $ (441,624)