Note 2 - Debt Securities - Summary of Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Gross Unrealized Losses, Less Than Twelve Months, AFS	$ (8,379)	$ (782)
Fair Value, Less Than Twelve Months, AFS	105,416	39,555
Gross Unrealized Losses, Over Twelve Months, AFS	(5,498)	(7)
Fair Value, Over Twelve Months, AFS	24,818	1,430
Gross Unrealized Losses, Less Than Twelve Months, Held-to-maturity	(1,614)
Fair Value, Less Than Twelve Months, held-to-maturity	10,180
Gross Unrealized Losses, Over Twelve Months, held-to-maturity	0
Fair Value, Over Twelve Months, Held-to-maturity	0
US Treasury and Government [Member]
Gross Unrealized Losses, Less Than Twelve Months, AFS	(1,997)
Fair Value, Less Than Twelve Months, AFS	45,068
Gross Unrealized Losses, Over Twelve Months, AFS	(218)
Fair Value, Over Twelve Months, AFS	751
US States and Political Subdivisions Debt Securities [Member]
Gross Unrealized Losses, Less Than Twelve Months, AFS	(1,541)	(240)
Fair Value, Less Than Twelve Months, AFS	13,261	8,429
Gross Unrealized Losses, Over Twelve Months, AFS	(1,459)	0
Fair Value, Over Twelve Months, AFS	6,095	0
Gross Unrealized Losses, Less Than Twelve Months, Held-to-maturity	(1,529)
Fair Value, Less Than Twelve Months, held-to-maturity	7,676
Gross Unrealized Losses, Over Twelve Months, held-to-maturity	0
Fair Value, Over Twelve Months, Held-to-maturity	0
Collateralized Mortgage-Backed Securities [Member]
Gross Unrealized Losses, Less Than Twelve Months, AFS	(4,781)	(528)
Fair Value, Less Than Twelve Months, AFS	44,408	28,207
Gross Unrealized Losses, Over Twelve Months, AFS	(3,783)	0
Fair Value, Over Twelve Months, AFS	16,770	0
Gross Unrealized Losses, Less Than Twelve Months, Held-to-maturity	(85)
Fair Value, Less Than Twelve Months, held-to-maturity	2,504
Gross Unrealized Losses, Over Twelve Months, held-to-maturity	0
Fair Value, Over Twelve Months, Held-to-maturity	0
Asset-Backed Securities [Member]
Gross Unrealized Losses, Less Than Twelve Months, AFS	(60)	0
Fair Value, Less Than Twelve Months, AFS	2,679	0
Gross Unrealized Losses, Over Twelve Months, AFS	(38)	(7)
Fair Value, Over Twelve Months, AFS	$ 1,202	1,430
US Government Agencies Debt Securities [Member]
Gross Unrealized Losses, Less Than Twelve Months, AFS		(14)
Fair Value, Less Than Twelve Months, AFS		2,919
Gross Unrealized Losses, Over Twelve Months, AFS		0
Fair Value, Over Twelve Months, AFS		$ 0