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Note 3 - Investment Securities - Expected Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Less than one year, Available for sale, Amortized Cost	$ 86,608	$ 76,153
Less than one year, Available for sale, Estimated Fair Value	86,701	76,140
More than one year to five years, Available for sale, Amortized Cost	132,182	92,104
Available for sale, Estimated Fair Value, More than one year to five years	128,224	86,972
More than five years to ten years, Available for sale, Amortized Cost	215,410	153,816
More than five years to ten years, Available for sale, Estimated Fair Value	194,320	136,671
More than ten years, Available for sale, Amortized Cost	15,216	24,997
More than ten years, Available for sale, Estimated Fair Value	10,945	19,178
Available for sale, amortized cost	449,416	347,070
Available for sale	420,190	318,961
Less than one year, Held to Maturity, Amortized Cost	500	0
Less than one year, Held to maturity, Estimated Fair Value	501	0
More than one year to five years, Held to maturity, Amortized Cost	360	501
More than one year to five years, Held to Maturity, Estimated Fair Value	347	504
More than five years to ten years, Held to maturity Amortized Cost	2,985	2,952
More than five years to ten years, Held to maturity Estimated Fair Value	2,795	2,873
More than ten years, Held to Maturity, Amortized Cost	1,346	1,756
More than ten years, Held to Maturity, Estimated Fair Value	1,305	1,720
Held to maturity (fair value of $4,948 and $5,097 at December 31, 2024 and December 31, 2023)	5,191	5,209
Securities held to maturity, fair value	4,948	5,097
US Government Agencies Debt Securities [Member]
Less than one year, Available for sale, Amortized Cost	90	0
Less than one year, Available for sale, Estimated Fair Value	88	0
More than one year to five years, Available for sale, Amortized Cost	11,644	8,705
Available for sale, Estimated Fair Value, More than one year to five years	11,304	8,161
More than five years to ten years, Available for sale, Amortized Cost	9,858	0
More than five years to ten years, Available for sale, Estimated Fair Value	9,650	0
More than ten years, Available for sale, Amortized Cost	0	0
More than ten years, Available for sale, Estimated Fair Value	0	0
Available for sale, amortized cost	21,592	8,705
Available for sale	21,042	8,161
Small Business Administration Agency Securities [Member]
Less than one year, Available for sale, Amortized Cost	0	0
Less than one year, Available for sale, Estimated Fair Value	0	0
More than one year to five years, Available for sale, Amortized Cost	5,934	2,292
Available for sale, Estimated Fair Value, More than one year to five years	5,721	2,095
More than five years to ten years, Available for sale, Amortized Cost	21,297	10,997
More than five years to ten years, Available for sale, Estimated Fair Value	21,043	11,122
More than ten years, Available for sale, Amortized Cost	0	0
More than ten years, Available for sale, Estimated Fair Value	0	0
Available for sale, amortized cost	27,231	13,289
Available for sale	26,764	13,217
Residential Mortgage-Backed Securities [Member]
Less than one year, Available for sale, Amortized Cost	0	0
Less than one year, Available for sale, Estimated Fair Value	0	0
More than one year to five years, Available for sale, Amortized Cost	8,892	11,023
Available for sale, Estimated Fair Value, More than one year to five years	8,099	9,986
More than five years to ten years, Available for sale, Amortized Cost	53,459	19,762
More than five years to ten years, Available for sale, Estimated Fair Value	47,578	16,965
More than ten years, Available for sale, Amortized Cost	0	9,722
More than ten years, Available for sale, Estimated Fair Value	0	7,701
Available for sale, amortized cost	62,351	40,507
Available for sale	55,677	34,652
Residential Collateralized Mortgage Obligations [Member]
Less than one year, Available for sale, Amortized Cost	5,126	18
Less than one year, Available for sale, Estimated Fair Value	5,235	17
More than one year to five years, Available for sale, Amortized Cost	55,015	36,876
Available for sale, Estimated Fair Value, More than one year to five years	52,867	35,758
More than five years to ten years, Available for sale, Amortized Cost	57,795	57,177
More than five years to ten years, Available for sale, Estimated Fair Value	47,374	46,552
More than ten years, Available for sale, Amortized Cost	0	0
More than ten years, Available for sale, Estimated Fair Value	0	0
Available for sale, amortized cost	117,936	94,071
Available for sale	105,476	82,327
Commercial Collateralized Mortgage Obligations [Member]
Less than one year, Available for sale, Amortized Cost	705	3,014
Less than one year, Available for sale, Estimated Fair Value	704	3,018
More than one year to five years, Available for sale, Amortized Cost	38,811	20,296
Available for sale, Estimated Fair Value, More than one year to five years	38,527	18,481
More than five years to ten years, Available for sale, Amortized Cost	54,768	46,631
More than five years to ten years, Available for sale, Estimated Fair Value	52,425	45,800
More than ten years, Available for sale, Amortized Cost	0	0
More than ten years, Available for sale, Estimated Fair Value	0	0
Available for sale, amortized cost	94,284	69,941
Available for sale	91,656	67,299
Commercial Paper [Member]
Less than one year, Available for sale, Amortized Cost	78,687	73,121
Less than one year, Available for sale, Estimated Fair Value	78,685	73,105
More than one year to five years, Available for sale, Amortized Cost	0	0
Available for sale, Estimated Fair Value, More than one year to five years	0	0
More than five years to ten years, Available for sale, Amortized Cost	0	0
More than five years to ten years, Available for sale, Estimated Fair Value	0	0
More than ten years, Available for sale, Amortized Cost	0	0
More than ten years, Available for sale, Estimated Fair Value	0	0
Available for sale, amortized cost	78,687	73,121
Available for sale	78,685	73,105
Corporate Debt Securities [Member]
Less than one year, Available for sale, Amortized Cost	2,000	0
Less than one year, Available for sale, Estimated Fair Value	1,989	0
More than one year to five years, Available for sale, Amortized Cost	11,886	12,912
Available for sale, Estimated Fair Value, More than one year to five years	11,706	12,491
More than five years to ten years, Available for sale, Amortized Cost	18,233	19,249
More than five years to ten years, Available for sale, Estimated Fair Value	16,250	16,232
More than ten years, Available for sale, Amortized Cost	2,614	2,639
More than ten years, Available for sale, Estimated Fair Value	1,870	1,968
Available for sale, amortized cost	34,733	34,800
Available for sale	31,815	30,691
Municipal Bonds [Member]
Less than one year, Available for sale, Amortized Cost	0	0
Less than one year, Available for sale, Estimated Fair Value	0	0
More than one year to five years, Available for sale, Amortized Cost	0	0
Available for sale, Estimated Fair Value, More than one year to five years	0	0
More than five years to ten years, Available for sale, Amortized Cost	0	0
More than five years to ten years, Available for sale, Estimated Fair Value	0	0
More than ten years, Available for sale, Amortized Cost	12,602	12,636
More than ten years, Available for sale, Estimated Fair Value	9,075	9,509
Available for sale, amortized cost	12,602	12,636
Available for sale	9,075	9,509
Less than one year, Held to Maturity, Amortized Cost	0	0
Less than one year, Held to maturity, Estimated Fair Value	0	0
More than one year to five years, Held to maturity, Amortized Cost	360	0
More than one year to five years, Held to Maturity, Estimated Fair Value	347	0
More than five years to ten years, Held to maturity Amortized Cost	2,985	2,952
More than five years to ten years, Held to maturity Estimated Fair Value	2,795	2,873
More than ten years, Held to Maturity, Amortized Cost	1,346	1,756
More than ten years, Held to Maturity, Estimated Fair Value	1,305	1,720
Held to maturity (fair value of $4,948 and $5,097 at December 31, 2024 and December 31, 2023)	4,691	4,708
Securities held to maturity, fair value	4,447	4,593
Taxable Municipal Bonds [Member]
Less than one year, Held to Maturity, Amortized Cost	500	0
Less than one year, Held to maturity, Estimated Fair Value	501	0
More than one year to five years, Held to maturity, Amortized Cost	0	501
More than one year to five years, Held to Maturity, Estimated Fair Value	0	504
More than five years to ten years, Held to maturity Amortized Cost	0	0
More than five years to ten years, Held to maturity Estimated Fair Value	0	0
More than ten years, Held to Maturity, Amortized Cost	0	0
More than ten years, Held to Maturity, Estimated Fair Value	0	0
Held to maturity (fair value of $4,948 and $5,097 at December 31, 2024 and December 31, 2023)	500	501
Securities held to maturity, fair value	$ 501	$ 504

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