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Note 9 - Employee Benefits (Details Textual) - USD ($)		12 Months Ended
Note 9 - Employee Benefits (Details Textual) - USD ($)	Mar. 24, 2017	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plan, Employer Matching Contribution, Percent of Match		4.00%
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares (in shares)	350,000
Employee Stock Ownership Plan (ESOP), Weighted Average Purchase Price of Shares Purchased (in dollars per share)	$ 10.00
Employee Stock Ownership Plan (ESOP), Compensation Expense		$ 476,482	$ 375,097
Employee Stock Ownership Plan (ESOP), Number of Committed-to-be-Released Shares (in shares)		23,437	23,437
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)		3 years
Share-Based Payment Arrangement, Expense		$ 205,403	$ 186,897
Share-Based Payment Arrangement, Tranche One [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage		0.33%
Defined Contribution Plan 401k Eligible Compensation [Member]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage		100.00%
Defined Contribution Plan 401k Profit Sharing [Member]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage		25.00%
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year		$ 273,851	272,527
Deferred Compensation Agreement [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.60%
Defined Benefit Plan, Accumulated Benefit Obligation		$ 486,387	529,117
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total		$ (42,731)	$ 58,671
Deferred Compensation Agreement [Member] \| Vesting Date A [Member]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage		25.00%
Deferred Compensation Agreement [Member] \| Vesting Date B [Member]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage		50.00%
Deferred Compensation Agreement [Member] \| Vesting Date C [Member]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage		75.00%
Deferred Compensation Agreement [Member] \| Vesting Date D [Member]
Defined Contribution Plan, Employers Matching Contribution, Annual Vesting Percentage		100.00%
Defined Benefit Plan, Cost of Providing Special and Contractual Termination Benefits		$ 1,689,467