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Note 13 - Long-term Debt (Details Textual)
Aug. 12, 2019
USD ($)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Long-term Debt, Current Maturities, Total       $ 504,170
First National Bank of Omaha [Member]          
Debt Maximum Borrowing Facility $ 40,000,000        
Minimum Consolidated Leverage Ratio Requirement       3.5  
Consolidated Fixed Charge Ratio Requirement       1.15  
First National Bank of Omaha [Member] | Forecast [Member]          
Minimum Consolidated Leverage Ratio Requirement   3 3.25    
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       $ 504,170  
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%