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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