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v3.23.1

Note 3 - Investment Securities (Details Textual) - USD ($) |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2022 | Sep. 30, 2018 | Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Debt Securities, Available-for-Sale and Held-to-Maturity, Allowance for Credit Loss |  |  | $ 0 |  |
Available-for-Sale, Securities in Unrealized Loss Positions, Depreciation from Amortized Cost Percentage |  |  | 8.20% |  |
Held-to-maturity, Securities in Unrealized Loss Positions, Depreciation from Amortized Cost Percentage |  |  | 24.30% |  |
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Total |  |  | $ 0 |  |
Proceeds from Sale of Debt Securities, Available-for-Sale |  |  | 0 | $ 0 |
Investment, Number of Shares Acquired (in shares) |  | 90,000 |  |  |
Investment Ownership Percentage |  | 5.00% |  |  |
Payments to Acquire Other Investments |  | $ 1,900,000 |  |  |
Equity Securities, FV-NI, Unrealized Gain (Loss) |  |  | 137,000 | $ 63,000 |
Equity Securities, FV-NI, Current |  |  | 1,600,000 |  | $ 1,500,000
Limited Partnership Interest, Technology Fund [Member] |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount | $ 0 |  | 0 |  |
Limited Partnership Interest, Technology Fund [Member] | Other Assets [Member] |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  | 1,000,000.0 |  | 1.0
Limited Partnership Interest, Technology Fund [Member] | Other Liabilities [Member] |  |  |  |  |
Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount |  |  | $ 680,000 |  | $ 780,000

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- Definition The held to maturity securities in unrealized loss positions depreciation from amortized cost percentage. + References No definition available. + Details
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- Definition Amount of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity) and 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/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-5 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aaa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483467/210-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482736/825-10-45-1A + Details
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- Definition Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479536/321-10-50-4 + Details
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- Definition Amount of financial support committed by investment company to investee that is contractually required but not provided. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480990/946-20-50-16 + Details
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