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Note 3 - Investment Securities | 3 Months Ended
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Mar. 31, 2026
Notes to Financial Statements |
Investment in Debt and Equity Instruments and Cash and Cash Equivalent [Text Block] | NOTE 3. INVESTMENT SECURITIES The following is a summary of the Company's investments in available for sale and held to maturity securities as of March 31, 2026 and December 31, 2025. None of the securities shown below required an allowance for credit losses.
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | unrealized |  |  | unrealized |  |  |  |  |
As of March 31, 2026 |  | cost |  |  | gains |  |  | losses |  |  | Fair value |
|  | (Dollars in thousands) |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 4,139 |  |  | $ | 8 |  |  | $ | 286 |  |  | $ | 3,861 |
Corporate debt obligations |  |  | 500 |  |  |  | 5 |  |  |  | — |  |  |  | 505 |
Total available for sale |  | $ | 4,639 |  |  | $ | 13 |  |  | $ | 286 |  |  | $ | 4,366 |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 4,719 |  |  | $ | — |  |  | $ | 974 |  |  | $ | 3,745 |
States and political subdivisions |  |  | 4,041 |  |  |  | — |  |  |  | 424 |  |  |  | 3,617 |
Total held to maturity |  | $ | 8,760 |  |  | $ | — |  |  | $ | 1,398 |  |  | $ | 7,362 |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | unrealized |  |  | unrealized |  |  |  |  |
As of December 31, 2025 |  | cost |  |  | gains |  |  | losses |  |  | Fair value |
|  | (Dollars in thousands) |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 4,515 |  |  | $ | 10 |  |  | $ | 279 |  |  | $ | 4,246 |
Corporate debt obligations |  |  | 500 |  |  |  | — |  |  |  | — |  |  |  | 500 |
Total available for sale |  | $ | 5,015 |  |  | $ | 10 |  |  | $ | 279 |  |  | $ | 4,746 |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 4,753 |  |  | $ | — |  |  | $ | 945 |  |  | $ | 3,808 |
States and political subdivisions |  |  | 4,024 |  |  |  | — |  |  |  | 345 |  |  |  | 3,679 |
Total held to maturity |  | $ | 8,777 |  |  | $ | — |  |  | $ | 1,290 |  |  | $ | 7,487 |
The amortized cost and fair value of debt securities classified as available for sale and held to maturity, by contractual maturity as of March 31, 2026 are as follows:
|  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |
|  | (Dollars in thousands) |
Available for sale: |  |  |  |  |  |  |  |
Due within one year |  | $ | 21 |  |  | $ | 18 |
Due after one year through five years |  |  | 1,445 |  |  |  | 1,353 |
Due after five years through ten years |  |  | 1,307 |  |  |  | 1,250 |
Due after ten years |  |  | 1,866 |  |  |  | 1,745 |
Total available for sale |  | $ | 4,639 |  |  | $ | 4,366 |
Held to maturity: |  |  |  |  |  |  |  |
Due within one year |  | $ | 1,571 |  |  | $ | 1,556 |
Due after one year through five years |  |  | — |  |  |  | — |
Due after five years through ten years |  |  | 2,470 |  |  |  | 2,061 |
Due after ten years |  |  | 4,719 |  |  |  | 3,745 |
Total held to maturity |  | $ | 8,760 |  |  | $ | 7,362 |
Expected maturities may differ from contractual maturities because the issuers of certain debt securities do have the right to call or prepay their obligations without any penalty. The Company did not sell any securities during the three months ended March 31, 2026 and 2025. The following tables show the gross unrealized losses and fair value of the Company's available for sale investments for which an allowance for credit losses has not been recorded, which are aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2026 and December 31, 2025:
As of March 31, 2026 |  | Less Than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
Description of Securities |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
|  | (Dollars in thousand) |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 5 |  |  | $ | — |  |  | $ | 3,519 |  |  | $ | 286 |  |  | $ | 3,524 |  |  | $ | 286 |
Total available for sale |  | $ | 5 |  |  | $ | — |  |  | $ | 3,519 |  |  | $ | 286 |  |  | $ | 3,524 |  |  | $ | 286 |
As of December 31, 2025 |  | Less Than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
Description of Securities |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
|  | (Dollars in thousands) |
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage-backed securities |  | $ | 46 |  |  | $ | — |  |  | $ | 3,816 |  |  | $ | 279 |  |  | $ | 3,862 |  |  | $ | 279 |
Total available for sale |  | $ | 46 |  |  | $ | — |  |  | $ | 3,816 |  |  | $ | 279 |  |  | $ | 3,862 |  |  | $ | 279 |
On at least a quarterly basis, we review all debt securities that are in an unrealized loss position for a credit loss. An investment security is deemed impaired if the fair value of the investment is less than its amortized cost. Amortized cost includes adjustments (if any) made to the cost basis of an investment for accretion, amortization, and previous other-than-temporary impairments. For individual debt securities classified as available for sale, we determine whether a decline in fair value below the amortized cost has resulted from a credit loss or other factors. If the decline in fair value is due to credit, we will record the portion of the impairment loss relating to credit through an allowance for credit losses. Impairment that has not been recorded through an allowance for credit losses is recorded through other comprehensive income, net of applicable taxes. The Company’s unrealized loss for the debt securities classified as available for sale is comprised of 2 securities in the less than 12 months loss position and 12 securities in the 12 months or greater loss position at March 31, 2026. These securities are mortgage-backed securities that had unrealized losses issued or guaranteed by the US government or US government sponsored entities. The unrealized losses associated with those mortgage-backed securities are generally driven by changes in interest rates and are not due to credit losses given the explicit or implicit guarantees provided by the U.S. government. The Company classifies the held-to-maturity debt securities into the following major security types: residential mortgage backed, and state and political subdivisions. These securities are highly rated with a history of no credit losses, and are assigned ratings based on the most recent data from ratings agencies depending on the availability of data for the security. Credit ratings of held-to-maturity debt securities, which are a significant input in calculating the expected credit loss, are reviewed on a quarterly basis. Based on the credit ratings of our held-to-maturity securities and our historical experience including no losses, we have determined that an allowance for credit loss on the held-to-maturity portfolio is not required. Because the Company does not intend to sell the securities and it is not more likely than not that the Company will be required to sell these investments before recovery of their amortized cost basis, the Company does not consider the unrealized loss in these securities to be credit losses at March 31, 2026.

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- Definition The entire disclosure for cash, cash equivalent, investment in debt and equity securities, equity method investment, investment in joint venture, and investment classified as other. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 65 -Paragraph 13 -Subparagraph (d)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482477/820-10-65-13 + Details
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