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Note 3 - Investment Securities - Amortized Cost and Fair Value of Available for Sale Securities and Held to Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Available for sale, amortized cost	$ 449,416	$ 347,070
Available for sale, gross unrealized gains	397	620
Available for sale, gross unrealized losses	(29,623)	(28,729)
Available for sale	420,190	318,961
Held to maturity (fair value of $4,948 and $5,097 at December 31, 2024 and December 31, 2023)	5,191	5,209
Held to maturity, gross unrealized gains	1	3
Held to maturity, gross unrealized losses	(244)	(115)
Securities held to maturity, fair value	4,948	5,097
US Government Agencies Debt Securities [Member]
Available for sale, amortized cost	21,592	8,705
Available for sale, gross unrealized gains	0	0
Available for sale, gross unrealized losses	(550)	(544)
Available for sale	21,042	8,161
Small Business Administration Agency Securities [Member]
Available for sale, amortized cost	27,231	13,289
Available for sale, gross unrealized gains	0	144
Available for sale, gross unrealized losses	(467)	(216)
Available for sale	26,764	13,217
Residential Mortgage-Backed Securities [Member]
Available for sale, amortized cost	62,351	40,507
Available for sale, gross unrealized gains	0	0
Available for sale, gross unrealized losses	(6,674)	(5,855)
Available for sale	55,677	34,652
Residential Collateralized Mortgage Obligations [Member]
Available for sale, amortized cost	117,936	94,071
Available for sale, gross unrealized gains	178	454
Available for sale, gross unrealized losses	(12,638)	(12,198)
Available for sale	105,476	82,327
Commercial Collateralized Mortgage Obligations [Member]
Available for sale, amortized cost	94,284	69,941
Available for sale, gross unrealized gains	175	22
Available for sale, gross unrealized losses	(2,803)	(2,664)
Available for sale	91,656	67,299
Commercial Paper [Member]
Available for sale, amortized cost	78,687	73,121
Available for sale, gross unrealized gains	1	0
Available for sale, gross unrealized losses	(3)	(16)
Available for sale	78,685	73,105
Corporate Debt Securities [Member]
Available for sale, amortized cost	34,733	34,800
Available for sale, gross unrealized gains	43	0
Available for sale, gross unrealized losses	(2,961)	(4,109)
Available for sale	31,815	30,691
Municipal Bonds [Member]
Available for sale, amortized cost	12,602	12,636
Available for sale, gross unrealized gains	0
Available for sale, gross unrealized losses	(3,527)
Available for sale	9,075	9,509
Held to maturity (fair value of $4,948 and $5,097 at December 31, 2024 and December 31, 2023)	4,691	4,708
Held to maturity, gross unrealized gains	0	0
Held to maturity, gross unrealized losses	(244)	(115)
Securities held to maturity, fair value	4,447	4,593
Commercial Mortgage-Backed Securities [Member]
Available for sale, amortized cost		12,636
Available for sale, gross unrealized gains		0
Available for sale, gross unrealized losses		(3,127)
Available for sale		9,509
Taxable Municipal Bonds [Member]
Held to maturity (fair value of $4,948 and $5,097 at December 31, 2024 and December 31, 2023)	500	501
Held to maturity, gross unrealized gains	1	3
Held to maturity, gross unrealized losses	0	0
Securities held to maturity, fair value	$ 501	$ 504

X

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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