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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2019
Factored Receivable Unpaid Principal Balance $ 187,000    
Factored Receivable, Customer Reserves 122,000    
Deferred Tax Assets, Net, Total 2,762,000 $ 2,741,000  
Deferred Tax Assets, Valuation Allowance, Total (0) 200,000  
Other Assets [Member]      
Operating Lease, Right-of-Use Asset $ 4,877,000 5,075,000  
Core Deposits [Member] | Other Assets [Member]      
Finite-Lived Intangible Assets, Net, Ending Balance   $ 7,000  
Accounting Standards Update 2016-02 [Member]      
Operating Lease, Right-of-Use Asset     $ 6,700,000
Building and Building Improvements [Member] | Minimum [Member]      
Property, Plant and Equipment, Useful Life (Year) 25 years    
Building and Building Improvements [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life (Year) 40 years    
Building [Member] | Minimum [Member]      
Property, Plant and Equipment, Useful Life (Year) 10 years    
Building [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life (Year) 20 years    
Furniture and Fixtures [Member] | Minimum [Member]      
Property, Plant and Equipment, Useful Life (Year) 5 years    
Furniture and Fixtures [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life (Year) 15 years    
Computer Equipment [Member] | Minimum [Member]      
Property, Plant and Equipment, Useful Life (Year) 2 years    
Computer Equipment [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life (Year) 5 years    
Automobiles [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life (Year) 4 years