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Note 3 - Available-for-sale Securities - Investment Securities in a Continuous Loss Position (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Available-for-sale securities in continuous loss position, less than 12 months, fair value | $ 65,955 | $ 81,657
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (13,042) | (2,318)
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 10,257 | 2,702
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | (2,172) | (66)
Available-for-sale securities in continuous loss position, fair value | 76,212 | 84,359
Available-for-sale securities in continuous loss position, unrealized loss | (15,214) | (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 | 46,311 | 60,606
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (8,388) | (1,196)
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 7,771 | 1,610
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | (1,788) | (49)
Available-for-sale securities in continuous loss position, fair value | 54,082 | 62,216
Available-for-sale securities in continuous loss position, unrealized loss | (10,176) | (1,245)
Corporate Debt Securities [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 14,888 | 15,042
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (4,151) | (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 | 14,888 | 15,042
Available-for-sale securities in continuous loss position, unrealized loss | (4,151) | (951)
Subordinated Notes [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 1,921 | 0
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (79) | 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 | 1,921 | 1,092
Available-for-sale securities in continuous loss position, unrealized loss | (79) | (17)
SBA Loan Pools [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 2,336 | 5,603
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (361) | (169)
Available-for-sale securities in continuous loss position, 12 months or more, fair value | 2,486 | 0
Available-for-sale securities in continuous loss position, 12 months or more, unrealized loss | (384) | 0
Available-for-sale securities in continuous loss position, fair value | 4,822 | 5,603
Available-for-sale securities in continuous loss position, unrealized loss | (745) | (169)
US States and Political Subdivisions Debt Securities [Member] |  |
Available-for-sale securities in continuous loss position, less than 12 months, fair value | 499 | 406
Available-for-sale securities in continuous loss position, less than 12 months, unrealized loss | (63) | (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 | 499 | 406
Available-for-sale securities in continuous loss position, unrealized loss | $ (63) | $ (2)

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