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Note 2 - Securities - Investments in an Unrealized Loss Position That Were Temporarily Impaired (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Less than 12 months, fair value, available for sale securities | $ 174,217 | $ 18,387
Less than 12 months, unrealized (loss), available for sale securities | (2,085) | (82)
12 months or more, fair value, available for sale securities | 15,758 | 0
12 months or more, unrealized (loss), available for sale securities | (511) | 0
Total, fair value, available for sale securities | 189,975 | 18,387
Total, unrealized (loss), available for sale securities | (2,596) | (82)
Less than 12 months, fair value, held to maturity securities | 6,410 |
Less than 12 months, fair value, held to maturity securities | (66) |
12 months or more, fair value, held to maturity securities | 0 |
12 months or more, unrealized (loss), available for sale securities | 0 |
Total, fair value, held to maturity securities | 6,410 |
Total, unrealized (loss), held to maturity securities | (66) |
Less than 12 months, fair value | 180,627 |
Less than 12 months, fair value, | (2,151) |
12 months or more, fair value | 15,758 |
12 months or more, unrealized (loss) | (511) |
Total, fair value | 196,385 |
Total, unrealized (loss) | (2,662) |
US Treasury Securities [Member] |  |
Less than 12 months, fair value, available for sale securities | 29,656 |
Less than 12 months, unrealized (loss), available for sale securities | (250) |
12 months or more, fair value, available for sale securities | 0 |
12 months or more, unrealized (loss), available for sale securities | 0 |
Total, fair value, available for sale securities | 29,656 |
Total, unrealized (loss), available for sale securities | (250) |
US Agency and Mortgage-backed Securities [Member] |  |
Less than 12 months, fair value, available for sale securities | 109,950 | 17,367
Less than 12 months, unrealized (loss), available for sale securities | (1,335) | (80)
12 months or more, fair value, available for sale securities | 14,749 | 0
12 months or more, unrealized (loss), available for sale securities | (502) | 0
Total, fair value, available for sale securities | 124,699 | 17,367
Total, unrealized (loss), available for sale securities | (1,837) | (80)
Less than 12 months, fair value, held to maturity securities | 5,411 |
Less than 12 months, fair value, held to maturity securities | (53) |
12 months or more, fair value, held to maturity securities | 0 |
12 months or more, unrealized (loss), available for sale securities | 0 |
Total, fair value, held to maturity securities | 5,411 |
Total, unrealized (loss), held to maturity securities | (53) |
US States and Political Subdivisions Debt Securities [Member] |  |
Less than 12 months, fair value, available for sale securities | 34,611 | 1,020
Less than 12 months, unrealized (loss), available for sale securities | (500) | (2)
12 months or more, fair value, available for sale securities | 1,009 | 0
12 months or more, unrealized (loss), available for sale securities | (9) | 0
Total, fair value, available for sale securities | 35,620 | 1,020
Total, unrealized (loss), available for sale securities | (509) | $ (2)
Less than 12 months, fair value, held to maturity securities | 999 |
Less than 12 months, fair value, held to maturity securities | (13) |
12 months or more, fair value, held to maturity securities | 0 |
12 months or more, unrealized (loss), available for sale securities | 0 |
Total, fair value, held to maturity securities | 999 |
Total, unrealized (loss), held to maturity securities | $ (13) |

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