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Note 2 - INVESTMENT SECURITIES - Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Securities held to maturity: |  |
Securities held to maturity, less than 12 months, fair value |  | $ 8,407
Securities held to maturity, less than 12 months, gross unrealized losses |  | (248)
Securities held to maturity, 12 months or more, fair value | $ 8,019 |
Securities held to maturity, 12 months or more, gross unrealized losses | (91) |
Securities held to maturity, fair value | 8,019 | 8,407
Securities held to maturity, gross unrealized losses | (91) | (248)
Securities available for sale: |  |
Securities available for sale, less than 12 months, fair value | 107,091 | 57,742
Securities available for sale, less than 12 months, gross unrealized losses | (2,806) | (485)
Securities available for sale, 12 months or more, fair value | 2,155 | 9,945
Securities available for sale, 12 months or more, gross unrealized losses | (3) | (39)
Securities available for sale, fair value | 109,246 | 67,687
Securities available for sale, gross unrealized losses | (2,809) | (524)
Municipal securities |  |
Securities available for sale: |  |
Securities available for sale, less than 12 months, fair value | 68,407 | 10,110
Securities available for sale, less than 12 months, gross unrealized losses | (1,622) | (48)
Securities available for sale, fair value | 68,407 | 10,110
Securities available for sale, gross unrealized losses | (1,622) | (48)
U.S. govt. sponsored agency securities |  |
Securities available for sale: |  |
Securities available for sale, less than 12 months, fair value | 2,963 | 3,199
Securities available for sale, less than 12 months, gross unrealized losses | (265) | (47)
Securities available for sale, fair value | 2,963 | 3,199
Securities available for sale, gross unrealized losses | (265) | (47)
Residential mortgage-backed and related securities |  |
Securities available for sale: |  |
Securities available for sale, less than 12 months, fair value | 35,721 | 37,549
Securities available for sale, less than 12 months, gross unrealized losses | (919) | (338)
Securities available for sale, 12 months or more, fair value | 157 |
Securities available for sale, 12 months or more, gross unrealized losses | (1) |
Securities available for sale, fair value | 35,878 | 37,549
Securities available for sale, gross unrealized losses | (920) | (338)
Asset-backed securities |  |
Securities available for sale: |  |
Securities available for sale, less than 12 months, fair value |  | 6,884
Securities available for sale, less than 12 months, gross unrealized losses |  | (52)
Securities available for sale, 12 months or more, fair value | 1,998 | 9,945
Securities available for sale, 12 months or more, gross unrealized losses | (2) | (39)
Securities available for sale, fair value | 1,998 | 16,829
Securities available for sale, gross unrealized losses | $ (2) | $ (91)

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