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Income Taxes (Narrative) (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2012
Dec. 31, 2022
Proceeds from sale of common stock         $ 22,500,000  
Net operating loss carry forwards $ 22,089,000   $ 22,089,000      
Carryforwards utilize limit before the stock offering closed     163,000      
Unutilized operating loss carryforwards that will expire 20,520,000   20,520,000      
Reduced deferred tax assets and valuation allowance 6,977,000   6,977,000      
Deferred tax liability to be recorded $ 473,000   $ 473,000      
Effective tax rate 19.60% 19.40% 19.70% 19.20%    
Additional bad debt deductions     $ 2,250,000      
Deferred tax asset, valuation allowance $ 0   0      
Deferred tax asset 4,637,000   4,637,000     $ 4,330,000
Unrecognized tax benefits $ 0   $ 0     $ 0
Minimum [Member]            
Net operating loss carryforwards, expiration year     2024      
Maximum [Member]            
Net operating loss carryforwards, expiration year     2032