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Note 3 - Available-for-sale Securities - Investment Securities in a Continuous Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Available-for-sale securities in continuous loss position, less than 12 months, fair value | $ 70,913 | $ 81,657
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (8,623) | (2,318)
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 9,537 | 2,702
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | (1,024) | (66)
Available-for-sale securities in continuous loss position, fair value | 80,450 | 84,359
Available-for-sale securities in continuous loss position, unrealized loss | (9,647) | (2,384)
Mortgage-Backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 52,958 | 60,606
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (5,216) | (1,196)
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 6,932 | 1,610
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | (758) | (49)
Available-for-sale securities in continuous loss position, fair value | 59,890 | 62,216
Available-for-sale securities in continuous loss position, unrealized loss | (5,974) | (1,245)
Corporate Debt Securities [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 12,931 | 15,042
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (3,065) | (951)
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 0 | 0
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | 0 | 0
Available-for-sale securities in continuous loss position, fair value | 12,931 | 15,042
Available-for-sale securities in continuous loss position, unrealized loss | (3,065) | (951)
Subordinated Notes [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 2,059 | 0
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (48) | 0
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 0 | 1,092
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | 0 | (17)
Available-for-sale securities in continuous loss position, fair value | 2,059 | 1,092
Available-for-sale securities in continuous loss position, unrealized loss | (48) | (17)
SBA Loan Pools [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 2,450 | 5,603
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (246) | (169)
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 2,605 | 0
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | (266) | 0
Available-for-sale securities in continuous loss position, fair value | 5,055 | 5,603
Available-for-sale securities in continuous loss position, unrealized loss | (512) | (169)
US States and Political Subdivisions Debt Securities [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 515 | 406
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (48) | (2)
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 0 | 0
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | 0 | 0
Available-for-sale securities in continuous loss position, fair value | 515 | 406
Available-for-sale securities in continuous loss position, unrealized loss | $ (48) | $ (2)

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