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Note 3 - Investments in Securities - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Amortized Cost, Available-for-sale | $ 36,820 | $ 34,080
Gross Unrealized Gains, Available-for-sale | 331 | 324
Gross Unrealized Losses, Available-for-sale | (85) | (87)
Allowance for Credit Losses, Available-for-sale | 0 | 0
Investments in available-for-sale securities, at fair value | 37,066 | 34,317
Collateralized Mortgage-Backed Securities [Member] |  |
Amortized Cost, Available-for-sale | 6,316 | 6,411
Gross Unrealized Gains, Available-for-sale | 25 | 51
Gross Unrealized Losses, Available-for-sale | (4) | (3)
Allowance for Credit Losses, Available-for-sale | 0 | 0
Investments in available-for-sale securities, at fair value | 6,337 | 6,459
Collateralized Mortgage Obligations [Member] |  |
Amortized Cost, Available-for-sale | 12,271 | 10,937
Gross Unrealized Gains, Available-for-sale | 12 | 48
Gross Unrealized Losses, Available-for-sale | (48) | (37)
Allowance for Credit Losses, Available-for-sale | 0 | 0
Investments in available-for-sale securities, at fair value | 12,235 | 10,948
Corporate Debt Securities [Member] |  |
Amortized Cost, Available-for-sale | 18,233 | 16,732
Gross Unrealized Gains, Available-for-sale | 294 | 225
Gross Unrealized Losses, Available-for-sale | (33) | (47)
Allowance for Credit Losses, Available-for-sale | 0 | 0
Investments in available-for-sale securities, at fair value | $ 18,494 | $ 16,910

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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