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Note 4 - Investment Securities (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Security Owned and Pledged as Collateral, Fair Value, Total | $ 418,000 |  | $ 418,000 |  | $ 627,000
Proceeds from Sale of Debt Securities, Available-for-sale | 3,800,000 |  | 11,661,000 | $ 6,136,000 |
Debt Securities, Available-for-sale, Realized Gain (Loss), Total | 52,000 | $ 7,000 | 210,000 | 7,000 |
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount | 0 | $ 0 | 0 | $ 147,000 |
Equity Securities without Readily Determinable Fair Value, Amount | $ 11,900,000 |  | $ 11,900,000 |  | $ 11,800,000

X
- Definition Amount of realized gain (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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563 + Details
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