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Shareholders Equity - Restricted and Performance Stock Units (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Restricted stock awards        
Share Compensation Plan        
Grant date fair value (in dollars per share)     $ 3.71  
Vesting period     3 years  
Stock based compensation expense $ 137,206 $ 172,052    
Compensation cost not yet recognized $ 850,929   $ 1,068,819  
Weighted average period for recognition 1 year 1 month 6 days   1 year 2 months 12 days  
Number outstanding        
Balance non-vested Restricted Stock at beginning of period (in shares) 290,070 346,499 346,499  
Granted (in shares) 0   111,900  
Vested (in shares)     (168,329)  
Forfeited (in shares) (22,000)      
Balance non-vested Restricted Stock at end of period (in shares) 268,070   290,070 346,499
Weighted Average Remaining Life        
Granted (in years)     3 years  
Forfeited (in years) 1 year 8 months 5 days      
Balance non-vested Restricted Stock at end of period (in years) 1 year 4 months 2 days   1 year 7 months 6 days 1 year 8 months 1 day
Performance stock units        
Share Compensation Plan        
Vesting period     3 years  
Stock based compensation expense $ 65,293 $ 0    
Compensation cost not yet recognized $ 503,293 $ 0    
Weighted average period for recognition 1 year 3 months 7 days 0 years    
Number outstanding        
Balance non-vested Restricted Stock at beginning of period (in shares) 193,167      
Granted (in shares) 0   214,000  
Vested (in shares)     (20,833)  
Balance non-vested Restricted Stock at end of period (in shares) 193,167   193,167  
Weighted Average Remaining Life        
Granted (in years)     1 year 7 months 10 days  
Balance non-vested Restricted Stock at end of period (in years) 1 year 4 months 6 days   1 year 7 months 6 days  
Performance stock units | TSR performance        
Share Compensation Plan        
Grant date fair value (in dollars per share)     $ 4.10  
Vesting percentage 50.00%   50.00%  
Performance stock units | CFDAS        
Share Compensation Plan        
Grant date fair value (in dollars per share)     $ 3.41  
Vesting percentage 50.00%   50.00%  
Maximum | Performance stock units        
Share Compensation Plan        
Percentage of number of shares issued on target award amounts 200.00%      
Minimum | Performance stock units        
Share Compensation Plan        
Percentage of number of shares issued on target award amounts 0.00%