Note 3 - Investment Securities - Schedule of Available-for-sale Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Amortized cost, available-for-sale	$ 65,761	$ 69,665
Gross unrealized gains, available-for-sale	4	26
Gross unrealized losses, available-for-sale	(10,018)	(9,763)
Fair value, available-for-sale	55,747	59,928
Collateralized Mortgage-Backed Securities [Member]
Amortized cost, available-for-sale	21,298	23,446
Gross unrealized gains, available-for-sale	0	0
Gross unrealized losses, available-for-sale	(4,105)	(3,931)
Fair value, available-for-sale	17,193	19,515
Subordinated Debt [Member]
Amortized cost, available-for-sale	8,971	9,970
Gross unrealized gains, available-for-sale	0	0
Gross unrealized losses, available-for-sale	(1,064)	(1,503)
Fair value, available-for-sale	7,907	8,467
Preferred Stocks [Member]
Amortized cost, available-for-sale	453
Gross unrealized gains, available-for-sale	0
Gross unrealized losses, available-for-sale	0
Fair value, available-for-sale	453
Taxable Municipal Bonds [Member]
Amortized cost, available-for-sale	10,623	10,649
Gross unrealized gains, available-for-sale	0	0
Gross unrealized losses, available-for-sale	(2,422)	(2,342)
Fair value, available-for-sale	8,201	8,307
Nontaxable Municipal Bonds [Member]
Amortized cost, available-for-sale	22,024	22,668
Gross unrealized gains, available-for-sale	0	23
Gross unrealized losses, available-for-sale	(2,403)	(1,949)
Fair value, available-for-sale	19,621	20,742
US Government Agencies Debt Securities [Member]
Amortized cost, available-for-sale	2,392	2,932
Gross unrealized gains, available-for-sale	4	3
Gross unrealized losses, available-for-sale	(24)	(38)
Fair value, available-for-sale	$ 2,372	$ 2,897