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Note 6 - Fair Value - Schedule of Assets and Liabilities Measured on Nonrecurring Basis (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Reported Value Measurement [Member]
Loans	$ 671,772	$ 714,337
Borrowings	119,413	172,173
Reported Value Measurement [Member] | Certificates of Deposit [Member]
Certificates of deposit	502,537	493,280
Estimate of Fair Value Measurement [Member]
Loans	648,287	686,977
Borrowings	120,045	172,575
Estimate of Fair Value Measurement [Member] | Certificates of Deposit [Member]
Certificates of deposit	503,120	493,769
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Loans	0	0
Borrowings	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Certificates of Deposit [Member]
Certificates of deposit	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Loans	0	0
Borrowings	120,045	172,575
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Certificates of Deposit [Member]
Certificates of deposit	503,120	493,769
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Loans	648,287	686,977
Borrowings	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] | Certificates of Deposit [Member]
Certificates of deposit	$ 0	$ 0

X

- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

+ References

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X

- Definition

Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

+ References

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-Section S99
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- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

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