Note 2 - Investment Securities - Schedule of Available-for-sale Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Amortized cost, available-for-sale	$ 64,722	$ 65,445
Gross unrealized gains, available-for-sale	43	40
Gross unrealized losses, available-for-sale	(7,744)	(7,531)
Fair value, available-for-sale	57,021	57,954
Collateralized Mortgage-Backed Securities [Member]
Amortized cost, available-for-sale	18,642	19,027
Gross unrealized gains, available-for-sale	4	7
Gross unrealized losses, available-for-sale	(3,012)	(2,981)
Fair value, available-for-sale	15,634	16,053
Subordinated Debt [Member]
Amortized cost, available-for-sale	11,626	11,872
Gross unrealized gains, available-for-sale	20	2
Gross unrealized losses, available-for-sale	(641)	(668)
Fair value, available-for-sale	11,005	11,206
Preferred Stocks [Member]
Amortized cost, available-for-sale	471	468
Gross unrealized gains, available-for-sale	0	0
Gross unrealized losses, available-for-sale	0	0
Fair value, available-for-sale	471	468
Taxable Municipal Bonds [Member]
Amortized cost, available-for-sale	9,591	9,597
Gross unrealized gains, available-for-sale	0	0
Gross unrealized losses, available-for-sale	(1,921)	(1,908)
Fair value, available-for-sale	7,670	7,689
Nontaxable Municipal Bonds [Member]
Amortized cost, available-for-sale	22,348	22,383
Gross unrealized gains, available-for-sale	10	25
Gross unrealized losses, available-for-sale	(2,154)	(1,957)
Fair value, available-for-sale	20,204	20,451
US Government Agencies Debt Securities [Member]
Amortized cost, available-for-sale	2,044	2,098
Gross unrealized gains, available-for-sale	9	6
Gross unrealized losses, available-for-sale	(16)	(17)
Fair value, available-for-sale	$ 2,037	$ 2,087

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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