Note 13 - Fair Value of Financial Instruments - Fair Value Measurements Nonrecurring basis (Details) - Fair Value, Nonrecurring [Member] - USD ($)		Jun. 30, 2023	Dec. 31, 2022
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		$ 8,058,653	$ 7,695,450
Mortgage Loans Held For Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		1,219,997	913,258
Collateral Dependent Loans [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	[1]	5,637,042	5,565,878
Other Real Estate Owned [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		105,000	119,700
Land Held for Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		1,096,614	1,096,614
Fair Value, Inputs, Level 1 [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0	0
Fair Value, Inputs, Level 1 [Member] | Mortgage Loans Held For Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0	0
Fair Value, Inputs, Level 1 [Member] | Collateral Dependent Loans [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	[1]	0	0
Fair Value, Inputs, Level 1 [Member] | Other Real Estate Owned [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0	0
Fair Value, Inputs, Level 1 [Member] | Land Held for Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		1,219,997	913,258
Fair Value, Inputs, Level 2 [Member] | Mortgage Loans Held For Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		1,219,997	913,258
Fair Value, Inputs, Level 2 [Member] | Collateral Dependent Loans [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	[1]	0	0
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0	0
Fair Value, Inputs, Level 2 [Member] | Land Held for Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		6,838,656	6,782,192
Fair Value, Inputs, Level 3 [Member] | Mortgage Loans Held For Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		0	0
Fair Value, Inputs, Level 3 [Member] | Collateral Dependent Loans [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	[1]	5,637,042	5,565,878
Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		105,000	119,700
Fair Value, Inputs, Level 3 [Member] | Land Held for Sale [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value		$ 1,096,614	$ 1,096,614

[1] Reported net of specific reserves. There were no specific reserves at June 30, 2023 and December 31, 2022.