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Note 10 - Retirement Plans (Details Textual)
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Number of Employees Covered by Life Insurance Policy 12  
Other Postretirement Benefits Cost (Reversal of Cost) $ 6,643 $ 6,356
Employee Benefits and Share-based Compensation $ 1,718,465 1,658,651
Supplemental Employee Retirement Plan [Member]    
Number of Employees Participating in Plan 3  
Employee Benefits and Share-based Compensation $ 168,129 207,858
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 $ 259,042 $ 237,612