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Note 3 - Investment Securities - Summary of Investment Securities with Unrealized Losses (Details) $ in Thousands | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | ---
Less than Twelve Months Estimated Fair Value, available for sale | $ 185,863 | $ 83,611
Less than Twelve Months Unrealized Losses, available for sale | $ (2,089) | $ (213)
Less than Twelve Months, number of positions, available for sale | 33 | 14
Twelve Months or More Estimated Fair Value, available for sale | $ 158,892 | $ 176,221
Twelve Months or More Unrealized Losses | $ (27,534) | $ (28,516)
Twelve Months or More, number of positions, available for sale | 106 | 107
Total Estimated Fair Value, available for sale | $ 344,755 | $ 259,832
Total Unrealized Losses, available for sale | $ (29,623) | $ (28,729)
Number of positions, available for sale | 139 | 121
Less than Twelve Months Estimated Fair Value, held to maturity | $ 0 | $ 1,397
Less than Twelve Months Unrealized Losses, held to maturity | $ 0 | $ (19)
Less than Twelve Months, number of positions,, held to maturity | 0 | 3
Twelve Months or More Estimated Fair Value, held to maturity | $ 4,447 | $ 3,196
Twelve Months or More Unrealized Losses, held to maturity | $ (244) | $ (96)
Twelve Months or More, number of positions, held to maturity | 10 | 7
Total Estimated Fair Value, held to maturity | $ 4,447 | $ 4,593
Total Unrealized Losses, held to maturity | $ (244) | $ (115)
Number of positions, held to maturity | 10 | 10
US Government Agencies Debt Securities [Member] |  |
Less than Twelve Months Estimated Fair Value, available for sale | $ 14,620 | $ 4,238
Less than Twelve Months Unrealized Losses, available for sale | $ (219) | $ (72)
Less than Twelve Months, number of positions, available for sale | 3 | 1
Twelve Months or More Estimated Fair Value, available for sale | $ 6,422 | $ 3,923
Twelve Months or More Unrealized Losses | $ (331) | $ (472)
Twelve Months or More, number of positions, available for sale | 4 | 3
Total Estimated Fair Value, available for sale | $ 21,042 | $ 8,161
Total Unrealized Losses, available for sale | $ (550) | $ (544)
Number of positions, available for sale | 7 | 4
SBA Securities [Member] |  |
Less than Twelve Months Estimated Fair Value, available for sale | $ 24,971 | $ 5,102
Less than Twelve Months Unrealized Losses, available for sale | $ (273) | $ (18)
Less than Twelve Months, number of positions, available for sale | 7 | 1
Twelve Months or More Estimated Fair Value, available for sale | $ 1,793 | $ 2,094
Twelve Months or More Unrealized Losses | $ (194) | $ (198)
Twelve Months or More, number of positions, available for sale | 4 | 4
Total Estimated Fair Value, available for sale | $ 26,764 | $ 7,196
Total Unrealized Losses, available for sale | $ (467) | $ (216)
Number of positions, available for sale | 11 | 5
Residential Mortgage-Backed Securities [Member] |  |
Less than Twelve Months Estimated Fair Value, available for sale | $ 25,479 | $ 0
Less than Twelve Months Unrealized Losses, available for sale | $ (578) | $ 0
Less than Twelve Months, number of positions, available for sale | 5 | 0
Twelve Months or More Estimated Fair Value, available for sale | $ 30,198 | $ 34,652
Twelve Months or More Unrealized Losses | $ (6,096) | $ (5,855)
Twelve Months or More, number of positions, available for sale | 15 | 15
Total Estimated Fair Value, available for sale | $ 55,677 | $ 34,652
Total Unrealized Losses, available for sale | $ (6,674) | $ (5,855)
Number of positions, available for sale | 20 | 15
Residential Collateralized Mortgage Obligations [Member] |  |
Less than Twelve Months Estimated Fair Value, available for sale | $ 36,166 | $ 2,597
Less than Twelve Months Unrealized Losses, available for sale | $ (649) | $ (37)
Less than Twelve Months, number of positions, available for sale | 8 | 1
Twelve Months or More Estimated Fair Value, available for sale | $ 55,255 | $ 60,275
Twelve Months or More Unrealized Losses | $ (11,989) | $ (12,161)
Twelve Months or More, number of positions, available for sale | 24 | 23
Total Estimated Fair Value, available for sale | $ 91,421 | $ 62,872
Total Unrealized Losses, available for sale | $ (12,638) | $ (12,198)
Number of positions, available for sale | 32 | 24
Commercial Collateralized Mortgage Obligations [Member] |  |
Less than Twelve Months Estimated Fair Value, available for sale | $ 35,753 | $ 18,463
Less than Twelve Months Unrealized Losses, available for sale | $ (367) | $ (70)
Less than Twelve Months, number of positions, available for sale | 7 | 5
Twelve Months or More Estimated Fair Value, available for sale | $ 30,114 | $ 35,077
Twelve Months or More Unrealized Losses | $ (2,436) | $ (2,594)
Twelve Months or More, number of positions, available for sale | 18 | 19
Total Estimated Fair Value, available for sale | $ 65,867 | $ 53,540
Total Unrealized Losses, available for sale | $ (2,803) | $ (2,664)
Number of positions, available for sale | 25 | 24
Commercial Paper [Member] |  |
Less than Twelve Months Estimated Fair Value, available for sale | $ 48,874 | $ 53,211
Less than Twelve Months Unrealized Losses, available for sale | $ (3) | $ (16)
Less than Twelve Months, number of positions, available for sale | 3 | 6
Twelve Months or More Estimated Fair Value, available for sale | $ 0 | $ 0
Twelve Months or More Unrealized Losses | $ 0 | $ 0
Twelve Months or More, number of positions, available for sale | 0 | 0
Total Estimated Fair Value, available for sale | $ 48,874 | $ 53,211
Total Unrealized Losses, available for sale | $ (3) | $ (16)
Number of positions, available for sale | 3 | 6
Corporate Debt Securities [Member] |  |
Less than Twelve Months Estimated Fair Value, available for sale | $ 0 | $ 0
Less than Twelve Months Unrealized Losses, available for sale | $ 0 | $ 0
Less than Twelve Months, number of positions, available for sale | 0 | 0
Twelve Months or More Estimated Fair Value, available for sale | $ 26,035 | $ 30,691
Twelve Months or More Unrealized Losses | $ (2,961) | $ (4,109)
Twelve Months or More, number of positions, available for sale | 30 | 32
Total Estimated Fair Value, available for sale | $ 26,035 | $ 30,691
Total Unrealized Losses, available for sale | $ (2,961) | $ (4,109)
Number of positions, available for sale | 30 | 32
Municipal Bonds [Member] |  |
Less than Twelve Months Estimated Fair Value, available for sale | $ 0 | $ 0
Less than Twelve Months Unrealized Losses, available for sale | $ 0 | $ 0
Less than Twelve Months, number of positions, available for sale | 0 | 0
Twelve Months or More Estimated Fair Value, available for sale | $ 9,075 | $ 9,509
Twelve Months or More Unrealized Losses | $ (3,527) | $ (3,127)
Twelve Months or More, number of positions, available for sale | 11 | 11
Total Estimated Fair Value, available for sale | $ 9,075 | $ 9,509
Total Unrealized Losses, available for sale | $ (3,527) | $ (3,127)
Number of positions, available for sale | 11 | 11
Less than Twelve Months Estimated Fair Value, held to maturity | $ 0 | $ 1,397
Less than Twelve Months Unrealized Losses, held to maturity | $ 0 | $ (19)
Less than Twelve Months, number of positions,, held to maturity | 0 | 3
Twelve Months or More Estimated Fair Value, held to maturity | $ 4,447 | $ 3,196
Twelve Months or More Unrealized Losses, held to maturity | $ (244) | $ (96)
Twelve Months or More, number of positions, held to maturity | 10 | 7
Total Estimated Fair Value, held to maturity | $ 4,447 | $ 4,593
Total Unrealized Losses, held to maturity | $ (244) | $ (115)
Number of positions, held to maturity | 10 | 10

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