Note 2 - Investment Securities - Summary of Unrealized Loss Positions (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Available-for-sale, less than 12 months, fair value	$ 6,106	$ 1,857
Available-for-sale, less than 12 months, unrealized loss	(170)	(45)
Available-for-sale, more than 12 months, fair value	43,030	46,218
Available-for-sale, more than 12 months, unrealized loss	(7,574)	(7,486)
Available-for-sale, fair value	49,136	48,075
Available-for-sale, unrealized loss	(7,744)	(7,531)
Collateralized Mortgage-Backed Securities [Member]
Available-for-sale, less than 12 months, fair value	0	0
Available-for-sale, less than 12 months, unrealized loss	0	0
Available-for-sale, more than 12 months, fair value	15,410	15,807
Available-for-sale, more than 12 months, unrealized loss	(3,012)	(2,981)
Available-for-sale, fair value	15,410	15,807
Available-for-sale, unrealized loss	(3,012)	(2,981)
Subordinated Debt [Member]
Available-for-sale, less than 12 months, fair value	1,647	1,857
Available-for-sale, less than 12 months, unrealized loss	(39)	(45)
Available-for-sale, more than 12 months, fair value	7,117	7,347
Available-for-sale, more than 12 months, unrealized loss	(602)	(623)
Available-for-sale, fair value	8,764	9,204
Available-for-sale, unrealized loss	(641)	(668)
Taxable Municipal Bonds [Member]
Available-for-sale, less than 12 months, fair value	0	0
Available-for-sale, less than 12 months, unrealized loss	0	0
Available-for-sale, more than 12 months, fair value	7,670	7,689
Available-for-sale, more than 12 months, unrealized loss	(1,921)	(1,908)
Available-for-sale, fair value	7,670	7,689
Available-for-sale, unrealized loss	(1,921)	(1,908)
Nontaxable Municipal Bonds [Member]
Available-for-sale, less than 12 months, fair value	4,459	0
Available-for-sale, less than 12 months, unrealized loss	(131)	0
Available-for-sale, more than 12 months, fair value	12,260	14,796
Available-for-sale, more than 12 months, unrealized loss	(2,023)	(1,957)
Available-for-sale, fair value	16,719	14,796
Available-for-sale, unrealized loss	(2,154)	(1,957)
US Government Agencies Debt Securities [Member]
Available-for-sale, less than 12 months, fair value	0	0
Available-for-sale, less than 12 months, unrealized loss	0	0
Available-for-sale, more than 12 months, fair value	573	579
Available-for-sale, more than 12 months, unrealized loss	(16)	(17)
Available-for-sale, fair value	573	579
Available-for-sale, unrealized loss	$ (16)	$ (17)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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