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Note 3 - Available-for-sale Securities - Investment Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Available-for-sale securities, amortized cost | $ 92,855 | $ 96,547
Available-for-sale securities, gross unrealized gains | 52 | 178
Available-for-sale securities, gross unrealized losses | (9,647) | (2,384)
Available-for-sale securities | 83,260 | 94,341
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities, amortized cost | 65,864 | 67,850
Available-for-sale securities, gross unrealized gains | 0 | 24
Available-for-sale securities, gross unrealized losses | (5,974) | (1,245)
Available-for-sale securities | 59,890 | 66,629
Corporate Debt Securities [Member] |  |
Available-for-sale securities, amortized cost | 17,754 | 17,754
Available-for-sale securities, gross unrealized gains | 43 | 118
Available-for-sale securities, gross unrealized losses | (3,065) | (951)
Available-for-sale securities | 14,732 | 16,921
Subordinated Notes [Member] |  |
Available-for-sale securities, amortized cost | 3,108 | 4,608
Available-for-sale securities, gross unrealized gains | 9 | 35
Available-for-sale securities, gross unrealized losses | (48) | (17)
Available-for-sale securities | 3,069 | 4,626
SBA Loan Pools [Member] |  |
Available-for-sale securities, amortized cost | 5,567 | 5,772
Available-for-sale securities, gross unrealized gains | 0 | 0
Available-for-sale securities, gross unrealized losses | (512) | (169)
Available-for-sale securities | 5,055 | 5,603
US States and Political Subdivisions Debt Securities [Member] |  |
Available-for-sale securities, amortized cost | 562 | 563
Available-for-sale securities, gross unrealized gains | 0 | 1
Available-for-sale securities, gross unrealized losses | (48) | (2)
Available-for-sale securities | $ 514 | $ 562

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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