Note 3 - Loans Receivable - Delinquencies Within the Loan Portfolio (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Loans receivable	$ 1,558,344	$ 1,519,019
Non-accrual Loans, no allowance	2,851	1,883
Nonaccrual, with ACL	110	205
Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	6,260	4,510
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	1,204	3,544
Financial Asset, Past Due [Member]
Loans receivable	7,464	8,054
Financial Asset, Not Past Due [Member]
Loans receivable	1,547,919	1,508,877
Residential Portfolio Segment [Member]
Loans receivable	189,376	183,793
Residential Portfolio Segment [Member] \| One-to-Four Family Loans [Member]
Loans receivable	143,748	148,515
Non-accrual Loans, no allowance	184	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	1,858	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	84	48
Residential Portfolio Segment [Member] \| One-to-Four Family Loans [Member] \| Financial Asset, Past Due [Member]
Loans receivable	1,942	1,639
Residential Portfolio Segment [Member] \| One-to-Four Family Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	141,622	146,578
Residential Portfolio Segment [Member] \| One-to-Four Family Construction [Member]
Loans receivable	45,628	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	45,628	35,278
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	940,507	918,839
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member]
Loans receivable	684,381	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	838	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	555	0
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Past Due [Member]
Loans receivable	1,393	660
Commercial Real Estate Portfolio Segment [Member] \| Commercial Real Estate Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	682,568	634,890
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Loans receivable	98,851	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	533	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	533	213
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	98,317	120,075
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member]
Loans receivable	157,275	162,580
Non-accrual Loans, no allowance	815	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	1,868	481
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	841
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member] \| Financial Asset, Past Due [Member]
Loans receivable	1,868	1,322
Commercial Real Estate Portfolio Segment [Member] \| Farmland Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	154,592	160,950
Home Equity Portfolio Segment [Member]
Loans receivable	108,629	108,073
Non-accrual Loans, no allowance	811	395
Nonaccrual, with ACL	0	0
Home Equity Portfolio Segment [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	247	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	247	637
Home Equity Portfolio Segment [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	107,571	107,041
Consumer Portfolio Segment [Member]
Loans receivable	21,459	24,424
Non-accrual Loans, no allowance	49	101
Nonaccrual, with ACL	24	109
Consumer Portfolio Segment [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	240	203
Consumer Portfolio Segment [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	0	0
Consumer Portfolio Segment [Member] \| Financial Asset, Past Due [Member]
Loans receivable	240	203
Consumer Portfolio Segment [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	21,146	24,011
Commercial Portfolio Segment [Member]
Loans receivable	298,373	283,890
Commercial Portfolio Segment [Member] \| Commercial Loans [Member]
Loans receivable	161,457	149,431
Non-accrual Loans, no allowance	73	183
Nonaccrual, with ACL	86	96
Commercial Portfolio Segment [Member] \| Commercial Loans [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	624	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	624	567
Commercial Portfolio Segment [Member] \| Commercial Loans [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	160,674	148,585
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member]
Loans receivable	136,916	134,459
Non-accrual Loans, no allowance	498	177
Nonaccrual, with ACL	0	0
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member] \| Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	52	168
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	565	2,645
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member] \| Financial Asset, Past Due [Member]
Loans receivable	617	2,813
Commercial Portfolio Segment [Member] \| Agricultural Loan [Member] \| Financial Asset, Not Past Due [Member]
Loans receivable	$ 135,801	$ 131,469

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

Jun. 30, 2026

Dec. 31, 2025

Loans receivable

$ 1,558,344

$ 1,519,019

Non-accrual Loans, no allowance

2,851

1,883

Nonaccrual, with ACL

110

205