Note 7 - Investments, Held to Maturity ("HTM") - Summary of HTM Securities in Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Fair value, less than 12 months, HTM	$ 11,560	$ 9,906
Unrealized losses, less then 12 months, HTM	(112)	(156)
Fair value, more than 12 months, HTM	55,196	56,428
Unrealized loss, more than 12 months, HTM	(4,146)	(5,024)
Fair value, unrealized loss position, HTM	66,756	66,334
Unrealized loss, unrealized loss position, HTM	(4,258)	(5,180)
US Treasury and Government [Member]
Fair value, less than 12 months, HTM	0	0
Unrealized losses, less then 12 months, HTM	0	0
Fair value, more than 12 months, HTM	11,963	11,928
Unrealized loss, more than 12 months, HTM	(21)	(39)
Fair value, unrealized loss position, HTM	11,963	11,928
Unrealized loss, unrealized loss position, HTM	(21)	(39)
Taxable Municipal Bonds [Member]
Fair value, less than 12 months, HTM	0	0
Unrealized losses, less then 12 months, HTM	0	0
Fair value, more than 12 months, HTM	961	953
Unrealized loss, more than 12 months, HTM	(15)	(20)
Fair value, unrealized loss position, HTM	961	953
Unrealized loss, unrealized loss position, HTM	(15)	(20)
Collateralized Mortgage-Backed Securities [Member]
Fair value, less than 12 months, HTM	11,560	9,906
Unrealized losses, less then 12 months, HTM	(112)	(156)
Fair value, more than 12 months, HTM	42,272	43,547
Unrealized loss, more than 12 months, HTM	(4,110)	(4,965)
Fair value, unrealized loss position, HTM	53,832	53,453
Unrealized loss, unrealized loss position, HTM	$ (4,222)	$ (5,121)