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Note 7 - Fair Value (Tables) | 9 Months Ended
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Sep. 30, 2025
Notes Tables |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  | Fair Value Measurements Using |  |  |  |  |
|  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |  | Fair Value |
September 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | $ | — |  |  | $ | 707 |  |  | $ | — |  |  | $ | 707 |
U.S. Treasury Bills and Notes |  |  | 533,354 |  |  |  | — |  |  |  | — |  |  |  | 533,354 |
Mortgage-backed securities - residential |  |  | — |  |  |  | 2,681 |  |  |  | — |  |  |  | 2,681 |
Collateralized mortgage obligations - residential |  |  | — |  |  |  | 761 |  |  |  | — |  |  |  | 761 |
|  | $ | 533,354 |  |  | $ | 4,149 |  |  | $ | — |  |  | $ | 537,503 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | $ | — |  |  | $ | 706 |  |  | $ | — |  |  | $ | 706 |
U.S. Treasury Bills and Notes |  |  | 246,290 |  |  |  | — |  |  |  | — |  |  |  | 246,290 |
U.S. government-sponsored agencies |  |  | — |  |  |  | 109,773 |  |  |  | — |  |  |  | 109,773 |
Mortgage-backed securities - residential |  |  | — |  |  |  | 2,911 |  |  |  | — |  |  |  | 2,911 |
Collateralized mortgage obligations - residential |  |  | — |  |  |  | 850 |  |  |  | — |  |  |  | 850 |
|  | $ | 246,290 |  |  | $ | 114,240 |  |  | $ | — |  |  | $ | 360,530 |
Fair Value Measurements, Nonrecurring [Table Text Block] |
|  | Fair Value Measurement Using |  |  |  |  |
|  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |  | Fair Value |
September 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans individually evaluated |  | $ | — |  |  | $ | — |  |  | $ | 6,346 |  |  | $ | 6,346 |
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] |
|  | Fair Value |  | Valuation Technique(s) |  | Significant Unobservable Input(s) |  |  | Range (Weighted Average) |
September 30, 2025 |  |  |  |  |  |  |  |  |  |  |  |
Loans individually evaluated |  | $ | 6,346 |  | Discounted cash flow |  | Discount applied to projected cash flow |  |  |  | 6.6 | %
Fair Value, by Balance Sheet Grouping [Table Text Block] |
|  |  |  |  |  | Fair Value Measurements at September 30, 2025 Using: |  |  |  |  |
|  | Carrying Amount |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 82,742 |  |  | $ | 82,270 |  |  | $ | 472 |  |  | $ | — |  |  | $ | 82,742 |
Interest-bearing time deposits in other financial institutions |  |  | 11,844 |  |  |  | — |  |  |  | 11,844 |  |  |  | — |  |  |  | 11,844 |
Securities |  |  | 537,503 |  |  |  | 533,354 |  |  |  | 4,149 |  |  |  | — |  |  |  | 537,503 |
Loans receivable, net of allowance for credit losses |  |  | 759,832 |  |  |  | — |  |  |  | — |  |  |  | 728,297 |  |  |  | 728,297 |
FHLB and FRB stock |  |  | 7,490 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | N /A |
Accrued interest receivable |  |  | 4,514 |  |  |  | 434 |  |  |  | 144 |  |  |  | 3,936 |  |  |  | 4,514 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | 261,860 |  |  |  | — |  |  |  | 261,003 |  |  |  | — |  |  |  | 261,003 |
Borrowings |  |  | 10,000 |  |  |  | — |  |  |  | 10,027 |  |  |  | — |  |  |  | 10,027 |
Subordinated notes |  |  | 18,274 |  |  |  | — |  |  |  | 17,390 |  |  |  | — |  |  |  | 17,390 |
|  |  |  |  |  | Fair Value Measurements at December 31, 2024 Using: |  |  |  |  |
|  | Carrying Amount |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Financial assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 84,829 |  |  | $ | 84,399 |  |  | $ | 430 |  |  | $ | — |  |  | $ | 84,829 |
Interest-bearing time deposits in other financial institutions |  |  | 34,156 |  |  |  | — |  |  |  | 34,156 |  |  |  | — |  |  |  | 34,156 |
Securities |  |  | 360,530 |  |  |  | 246,290 |  |  |  | 114,240 |  |  |  | — |  |  |  | 360,530 |
Loans receivable, net of allowance for credit losses |  |  | 887,586 |  |  |  | — |  |  |  | — |  |  |  | 845,303 |  |  |  | 845,303 |
FHLB and FRB stock |  |  | 7,490 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | N /A |
Accrued interest receivable |  |  | 6,401 |  |  |  | 158 |  |  |  | 1,452 |  |  |  | 4,791 |  |  |  | 6,401 |
Financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | 234,979 |  |  |  | — |  |  |  | 233,639 |  |  |  | — |  |  |  | 233,639 |
Borrowings |  |  | 20,000 |  |  |  | — |  |  |  | 19,990 |  |  |  | — |  |  |  | 19,990 |
Subordinated notes |  |  | 18,736 |  |  |  | — |  |  |  | 17,571 |  |  |  | — |  |  |  | 17,571 |

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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