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Note 3 - Loans Receivable - Delinquencies Within the Loan Portfolio (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Loans receivable	$ 1,519,286	$ 1,519,019
Non-accrual Loans, no allowance	2,130	1,883
Nonaccrual, with ACL	198	205
Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	7,023	4,510
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	3,206	3,544
Financial Asset, Past Due [Member]
Loans receivable	10,229	8,054
Financial Asset, Not Past Due [Member]
Loans receivable	1,506,729	1,508,877
Residential Portfolio Segment [Member]
Loans receivable	188,784	183,793
Residential Portfolio Segment [Member] | One-to-Four Family Loans [Member]
Loans receivable	145,070	148,515
Non-accrual Loans, no allowance	189	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	2,161	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	158	48
Residential Portfolio Segment [Member] | One-to-Four Family Loans [Member] | Financial Asset, Past Due [Member]
Loans receivable	2,319	1,639
Residential Portfolio Segment [Member] | One-to-Four Family Loans [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	142,562	146,578
Residential Portfolio Segment [Member] | One-to-Four Family Construction [Member]
Loans receivable	43,714	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	43,714	35,278
Commercial Real Estate Portfolio Segment [Member]
Loans receivable	926,631	918,839
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Loan [Member]
Loans receivable	667,685	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	3,097	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	3	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Financial Asset, Past Due [Member]
Loans receivable	3,100	660
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Loan [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	664,165	634,890
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Loans receivable	98,282	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	81	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	81	213
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	98,200	120,075
Commercial Real Estate Portfolio Segment [Member] | Farmland Loan [Member]
Loans receivable	160,664	162,580
Non-accrual Loans, no allowance	578	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	90	481
Commercial Real Estate Portfolio Segment [Member] | Farmland Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	815	841
Commercial Real Estate Portfolio Segment [Member] | Farmland Loan [Member] | Financial Asset, Past Due [Member]
Loans receivable	905	1,322
Commercial Real Estate Portfolio Segment [Member] | Farmland Loan [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	159,181	160,950
Home Equity Portfolio Segment [Member]
Loans receivable	109,278	108,073
Non-accrual Loans, no allowance	550	395
Nonaccrual, with ACL	0	0
Home Equity Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	555	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	555	637
Home Equity Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	108,173	107,041
Consumer Portfolio Segment [Member]
Loans receivable	23,154	24,424
Non-accrual Loans, no allowance	58	101
Nonaccrual, with ACL	112	109
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	66	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	66	203
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	22,918	24,011
Commercial Portfolio Segment [Member]
Loans receivable	271,439	283,890
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans receivable	151,580	149,431
Non-accrual Loans, no allowance	178	183
Nonaccrual, with ACL	86	96
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	756	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	756	567
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	150,560	148,585
Commercial Portfolio Segment [Member] | Agricultural Loan [Member]
Loans receivable	119,859	134,459
Non-accrual Loans, no allowance	156	177
Nonaccrual, with ACL	0	0
Commercial Portfolio Segment [Member] | Agricultural Loan [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Loans receivable	217	168
Commercial Portfolio Segment [Member] | Agricultural Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans receivable	2,230	2,645
Commercial Portfolio Segment [Member] | Agricultural Loan [Member] | Financial Asset, Past Due [Member]
Loans receivable	2,447	2,813
Commercial Portfolio Segment [Member] | Agricultural Loan [Member] | Financial Asset, Not Past Due [Member]
Loans receivable	$ 117,256	$ 131,469

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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+ References

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