Note 4 - Securities Available for Sale (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Debt Securities, Available-for-Sale [Table Text Block]

(Dollars in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
December 31, 2023
Mortgage-backed securities:
Federal National Mortgage Association (FNMA)	$	96,837		0		(9,704	)		87,133
Federal Home Loan Mortgage Corporation (FHLMC)		82,495		0		(8,246	)		74,249
Collateralized mortgage obligations:
FNMA		34		0		(2	)		32
		179,366		0		(17,952	)		161,414
Other marketable securities:
U.S. Government agency obligations		54,112		120		(552	)		53,680
		54,112		120		(552	)		53,680
	$	233,478		120		(18,504	)		215,094
December 31, 2022
Mortgage-backed securities:
FNMA	$	117,690		0		(12,754	)		104,936
FHLMC		98,893		0		(11,177	)		87,716
Collateralized mortgage obligations:
FNMA		38		0		(2	)		36
		216,621		0		(23,933	)		192,688
Other marketable securities:
U.S. Government agency obligations		54,998		0		(2,157	)		52,841
Corporate preferred stock		700		0		(210	)		490
		55,698		0		(2,367	)		53,331
	$	272,319		0		(26,300	)		246,019

Gain (Loss) on Securities [Table Text Block]

	Less Than Twelve Months							Twelve Months or More							Total
(Dollars in thousands)	# of Investments		Fair Value		Unrealized Losses			# of Investments		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
December 31, 2023
Mortgage backed securities:
FNMA		0	$	0		0			34	$	87,133		(9,704	)	$	87,133		(9,704	)
FHLMC		0		0		0			24		74,249		(8,246	)		74,249		(8,246	)
Collateralized mortgage obligations:
FNMA		0		0		0			1		32		(2	)		32		(2	)
Other marketable securities:
U.S. government and agency obligations		1		5,000		(9	)		7		34,456		(543	)		39,456		(552	)
Total		1	$	5,000		(9	)		66	$	195,870		(18,495	)	$	200,870		(18,504	)
December 31, 2022
Mortgage backed securities:
FNMA		12	$	19,337		(1,629	)		22	$	85,599		(11,125	)	$	104,936		(12,754	)
FHLMC		4		10,542		(1,214	)		20		77,174		(9,963	)		87,716		(11,177	)
Collateralized mortgage obligations:
FNMA		1		36		(2	)		0		0		0			36		(2	)
Other marketable securities:
U.S. government and agency obligations		4		19,334		(667	)		7		33,507		(1,490	)		52,841		(2,157	)
Corporate preferred stock		0		0		0			1		490		(210	)		490		(210	)
Total		21	$	49,249		(3,512	)		50	$	196,770		(22,788	)	$	246,019		(26,300	)

Available-for-Sale Securities [Member]

Notes Tables

Contractual Obligation, Fiscal Year Maturity [Table Text Block]

(Dollars in thousands)	Amortized Cost		Fair Value
Due one year or less	$	64,814		60,590
Due after one year through five years		134,875		124,096
Due after five years through fifteen years		33,786		30,405
Due after fifteen years		3		3
Total	$	233,478		215,094