Note 3 - Investment Securities - Schedule of Available for Sale Debt Securities in Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Residential mortgage-backed securities, debt securities, available for sale, continuous unrealized loss position, less than twelve months, fair value	$ 5	$ 46
Residential mortgage-backed securities, debt securities, available for sale, unrealized loss position, less than 12 months, unrealized losses	0	0
Residential mortgage-backed securities, debt securities, available for sale, unrealized loss position, twelve months or greater, fair value	3,519	3,816
Residential mortgage-backed securities, debt securities, available for sale, unrealized loss position, twelve months or greater, unrealized losses	286	279
Residential mortgage-backed securities, debt securities, available for sale, fair value, total	3,524	3,862
Residential mortgage-backed securities, debt securities, available for sale, unrealized loss position, unrealized losses, total	286	279
Residential Mortgage-Backed Securities [Member]
Residential mortgage-backed securities, debt securities, available for sale, continuous unrealized loss position, less than twelve months, fair value	5	46
Residential mortgage-backed securities, debt securities, available for sale, unrealized loss position, less than 12 months, unrealized losses	0	0
Residential mortgage-backed securities, debt securities, available for sale, unrealized loss position, twelve months or greater, fair value	3,519	3,816
Residential mortgage-backed securities, debt securities, available for sale, unrealized loss position, twelve months or greater, unrealized losses	286	279
Residential mortgage-backed securities, debt securities, available for sale, fair value, total	3,524	3,862
Residential mortgage-backed securities, debt securities, available for sale, unrealized loss position, unrealized losses, total	$ 286	$ 279

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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