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Subsequent Events (Narrative) (Details) - USD ($)
$ in Millions
May 11, 2021
Feb. 10, 2020
Mar. 31, 2021
Subsequent Event [Member] | Wall Street Journal prime rate [Member]      
Subsequent Event [Line Items]      
Debt conversion, converted instrument, amount $ 5.0    
Revolving Line of Credit [Member]      
Subsequent Event [Line Items]      
Line of credit     $ 10.0
Revolving Line of Credit [Member] | Subsequent Event [Member] | Wall Street Journal prime rate [Member]      
Subsequent Event [Line Items]      
Interest rate per annum 1.70%    
Revolving Line of Credit [Member] | Subsequent Event [Member] | Minimum [Member] | Wall Street Journal prime rate [Member]      
Subsequent Event [Line Items]      
Interest rate per annum 4.95%    
C3bank [Member]      
Subsequent Event [Line Items]      
Line of credit   $ 5.0  
Debt instrument, Maturity date   Apr. 05, 2021  
C3bank [Member] | Minimum [Member]      
Subsequent Event [Line Items]      
Interest rate per annum   5.25%  
C3bank [Member] | Maximum [Member]      
Subsequent Event [Line Items]      
Interest rate per annum   5.50%  
C3bank [Member] | Revolving Line of Credit [Member] | Subsequent Event [Member]      
Subsequent Event [Line Items]      
Line of credit $ 10.0    
Debt instrument, Maturity date May 11, 2023