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Note 13 - Long-term Debt (Details Textual)
12 Months Ended
Aug. 12, 2019
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2021
Dec. 31, 2019
USD ($)
Long-term Debt, Total   $ 23,057,650    
Long-term Debt, Current Maturities, Total   1,282,504   $ 504,170
Long-Term Debt, Maturity, Year One   1,282,504    
Long-Term Debt, Maturity, Year Two   1,236,787    
Long-Term Debt, Maturity, Year Three   1,288,398    
Long-Term Debt, Maturity, Year Four   1,339,956    
Long-Term Debt, Maturity, Year Five   1,398,138    
Long-Term Debt, Maturity, after Year Five   16,511,867    
First National Bank of Omaha [Member]        
Long-term Line of Credit, Total   $ 0    
Minimum Consolidated Leverage Ratio Requirement   3.25   3.50
Consolidated Fixed Charge Ratio Requirement   1.15    
First National Bank of Omaha [Member] | Forecast [Member]        
Minimum Consolidated Leverage Ratio Requirement     3.00  
First National Bank of Omaha [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility, Maximum Borrowing Capacity $ 5,000,000      
First National Bank of Omaha [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]        
Debt Instrument, Basis Spread on Variable Rate 2.00%      
First National Bank of Omaha [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]        
Debt Instrument, Basis Spread on Variable Rate 2.50%      
First National Bank of Omaha [Member] | Term Loan [Member]        
Debt Instrument, Face Amount $ 23,560,000      
Long-term Debt, Total   $ 23,057,650    
Long-term Debt, Current Maturities, Total   1,282,504    
First National Bank of Omaha [Member] | Term Loan 1 [Member]        
Long-term Debt, Total   $ 18,060,000    
Debt Instrument, Term (Year)   15 years    
Debt Instrument, Interest Rate, Stated Percentage   4.25%    
First National Bank of Omaha [Member] | Term Loan 2 [Member]        
Long-term Debt, Total   $ 5,500,000    
Debt Instrument, Interest Rate, Stated Percentage   3.375%