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v3.23.2

Note 3 - Investment Securities (Details Textual) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Debt Securities, Available-for-Sale and Held-to-Maturity, Allowance for Credit Loss |  | $ 0 |  | $ 0 |  |
Available-for-Sale, Securities in Unrealized Loss Positions, Depreciation from Amortized Cost Percentage |  | 9.00% |  | 9.00% |  |
Held-to-maturity, Securities in Unrealized Loss Positions, Depreciation from Amortized Cost Percentage |  | 32.20% |  | 32.20% |  |
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Total |  |  |  | $ 0 |  |
Debt Securities, Available-for-Sale, Realized Gain |  |  |  | 78,000 |  |
Debt Securities, Available-for-Sale, Realized Loss |  |  |  | 92,000 |  |
Proceeds from Sale of Debt Securities, Available-for-Sale |  |  | $ 0 | 10,816,000 | $ 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) |  | $ (92,000) | (99,000) | 45,000 | (36,000) |
Equity Securities, FV-NI, Current |  | 1,500,000 |  | 1,500,000 |  | $ 1,500,000
Limited Partnership Interest, Technology Fund [Member] |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount |  | 0 | $ 0 | 0 | $ 0 |
Limited Partnership Interest, Technology Fund [Member] | Other Assets [Member] |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  | 1,000,000.0 |  | 1,000,000.0 |  | 1,000,000.0
Limited Partnership Interest, Technology Fund [Member] | Other Liabilities [Member] |  |  |  |  |  |
Investment Company, Financial Support to Investee Contractually Required, Not Provided, Amount |  | $ 630,000 |  | $ 630,000 |  | $ 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 realized gain 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 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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- Definition Amount of realized loss 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 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-9 + Details
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