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Note 12 - Long-term Debt (Details Textual)
Aug. 12, 2019
USD ($)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
Long-term Debt, Current Maturities, Total         $ 287,139
First National Bank of Omaha [Member]            
Debt Maximum Borrowing Facility $ 40,000,000          
Consolidated Fixed Charge Ratio Requirement         1.15  
First National Bank of Omaha [Member] | Forecast [Member]            
Minimum Consolidated Leverage Ratio Requirement   3 3.25 3.5    
First National Bank of Omaha [Member] | Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity $ 5,000,000          
Long-term Line of Credit, Total         $ 0  
First National Bank of Omaha [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Revolving Credit Facility [Member]            
Debt Instrument, Basis Spread on Variable Rate 2.00%          
First National Bank of Omaha [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Revolving Credit Facility [Member]            
Debt Instrument, Basis Spread on Variable Rate 2.50%          
First National Bank of Omaha [Member] | Term Loan 1 [Member]            
Debt Instrument, Term 15 years          
Debt Instrument, Interest Rate, Stated Percentage 4.25%          
Long-term Debt, Total         18,060,000  
Long-term Debt, Current Maturities, Total         $ 287,139  
First National Bank of Omaha [Member] | Term Loan 1 [Member] | Minimum [Member]            
Debt Instrument, Interest Rate, Effective Percentage 4.20%          
First National Bank of Omaha [Member] | Term Loan 2 [Member]            
Debt Instrument, Term 25 years          
First National Bank of Omaha [Member] | Term Loan 2 [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Debt Instrument, Basis Spread on Variable Rate 1.95%