Note 3 - Loans Receivable - Delinquencies Within the Loan Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Loans receivable	$ 1,717,378	$ 1,519,019
Non-accrual Loans, no allowance	6,654	1,883
Nonaccrual, with ACL	112	205
Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	5,760	4,510
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	1,937	3,544
Financial Asset, Past Due [Member]
Loans receivable	7,697	8,054
Financial Asset, Not Past Due [Member]
Loans receivable	1,702,915	1,508,877
Residential Portfolio Segment [Member]
Loans receivable	199,226	183,793
Residential Portfolio Segment [Member] \| One-to-Four Family Loans [Member]
Loans receivable	141,025	148,515
Non-accrual Loans, no allowance	274	298
Nonaccrual, with ACL	0	0
Residential Portfolio Segment [Member] \| One-to-Four Family Loans [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	1,229	1,591
Residential Portfolio Segment [Member] \| One-to-Four Family Loans [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	325	48
Residential Portfolio Segment [Member] \| One-to-Four Family Loans [Member] \| Financial Asset, Past Due [Member]
Loans receivable	1,554	1,639
Residential Portfolio Segment [Member] \| One-to-Four Family Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	139,197	146,578
Residential Portfolio Segment [Member] \| One-to-Four Family Construction [Member]
Loans receivable	58,201	35,278
Non-accrual Loans, no allowance	0	0
Nonaccrual, with ACL	0	0
Residential Portfolio Segment [Member] \| One-to-Four Family Construction [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	0	0
Residential Portfolio Segment [Member] \| One-to-Four Family Construction [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Residential Portfolio Segment [Member] \| One-to-Four Family Construction [Member] \| Financial Asset, Past Due [Member]
Loans receivable	0	0
Residential Portfolio Segment [Member] \| One-to-Four Family Construction [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	58,201	35,278
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	1,061,474	918,839
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Loans receivable	784,706	635,970
Non-accrual Loans, no allowance	420	420
Nonaccrual, with ACL	0	0
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	91	660
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Past Due [Member]
Loans receivable	91	660
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	784,195	634,890
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Loans receivable	104,558	120,289
Non-accrual Loans, no allowance	1	1
Nonaccrual, with ACL	0	0
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	2,468	213
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Past Due [Member]
Loans receivable	2,468	213
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	102,089	120,075
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member]
Loans receivable	172,210	162,580
Non-accrual Loans, no allowance	4,420	308
Nonaccrual, with ACL	0	0
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	0	481
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	992	841
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member] \| Financial Asset, Past Due [Member]
Loans receivable	992	1,322
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	166,798	160,950
Home Equity Portfolio Segment [Member]
Loans receivable	115,937	108,073
Non-accrual Loans, no allowance	303	395
Nonaccrual, with ACL	0	0
Home Equity Portfolio Segment [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	436	637
Home Equity Portfolio Segment [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Home Equity Portfolio Segment [Member] \| Financial Asset, Past Due [Member]
Loans receivable	436	637
Home Equity Portfolio Segment [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	115,198	107,041
Consumer Portfolio Segment [Member]
Loans receivable	21,096	24,424
Non-accrual Loans, no allowance	44	101
Nonaccrual, with ACL	26	109
Consumer Portfolio Segment [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	245	203
Consumer Portfolio Segment [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	14	0
Consumer Portfolio Segment [Member] \| Financial Asset, Past Due [Member]
Loans receivable	259	203
Consumer Portfolio Segment [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	20,767	24,011
Commercial Portfolio Segment [Member]
Loans receivable	319,645	283,890
Commercial Portfolio Segment [Member] \| Commercial Loans [Member]
Loans receivable	175,001	149,431
Non-accrual Loans, no allowance	200	183
Nonaccrual, with ACL	86	96
Commercial Portfolio Segment [Member] \| Commercial Loans [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	599	557
Commercial Portfolio Segment [Member] \| Commercial Loans [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	10
Commercial Portfolio Segment [Member] \| Commercial Loans [Member] \| Financial Asset, Past Due [Member]
Loans receivable	599	567
Commercial Portfolio Segment [Member] \| Commercial Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	174,116	148,585
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member]
Loans receivable	144,644	134,459
Non-accrual Loans, no allowance	992	177
Nonaccrual, with ACL	0	0
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	692	168
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	606	2,645
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member] \| Financial Asset, Past Due [Member]
Loans receivable	1,298	2,813
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	$ 142,354	$ 131,469

Note 3 - Loans Receivable - Delinquencies Within the Loan Portfolio (Details) - USD ($)
$ in Thousands

Sep. 30, 2026

Dec. 31, 2025

Loans receivable

$ 1,717,378

$ 1,519,019

Non-accrual Loans, no allowance

6,654

1,883

Nonaccrual, with ACL

112

205