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Note 9 - Retirement Plans (Details Textual)
12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Number of Employees Covered by Life Insurance Policy 12  
Other Postretirement Benefits Cost (Reversal of Cost) $ 7,337 $ 6,809
Employee Benefits and Share-Based Compensation $ 2,000,932 1,798,150
Supplemental Employee Retirement Plan [Member]    
Number of Employees Participating in Plan 4  
Employee Benefits and Share-Based Compensation $ 165,751 154,911
Profit Sharing Plan [Member]    
Defined Contribution Plan, Employer Matching Contribution, Percent of Match 4.00%  
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage 100.00%  
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 261,337 $ 256,251