Note 4 - Securities (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	As of December 31, 2020
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Costs		Gains		Losses			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	32,164	$	838	$	(8	)	$	32,994
Obligations of state and political subdivisions		103,424		4,971		(29	)		108,366
Residential mortgage-backed securities and collateralized mortgage obligations		236,829		3,895		(246	)		240,478
Commercial mortgage-backed securities		27,455		637		(18	)		28,074
Other asset-backed securities		36,377		592		(1	)		36,968
Total	$	436,249	$	10,933	$	(302	)	$	446,880

	As of December 31, 2019
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Costs		Gains		Losses			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	38,291	$	469	$	(27	)	$	38,733
Obligations of state and political subdivisions		40,702		1,422		(26	)		42,098
Residential mortgage-backed securities and collateralized mortgage obligations		179,114		2,163		(442	)		180,835
Corporate securities		3,005		6		(45	)		2,966
Commercial mortgage-backed securities		19,126		221		(40	)		19,307
Other asset-backed securities		3,019		—		(8	)		3,011
Total	$	283,257	$	4,281	$	(588	)	$	286,950

Amortized Cost and Estimated Fair Value Available for Sale Securities [Table Text Block]

	Available-For-Sale
(Amounts in thousands)	Amortized Cost		Fair Value
Amounts maturing in:
One year or less	$	18,591	$	18,892
After one year through five years		104,009		107,911
After five years through ten years		127,924		129,469
After ten years		185,725		190,608
Total	$	436,249	$	446,880

Schedule of Realized Gain (Loss) [Table Text Block]

	For Years Ended December 31,
(Amounts in thousands)	2020			2019
Investment Securities:
Proceeds from sales of investment securities	$	56,017		$	117,299
Gross realized gains on sales of investments securities:
U.S. government & agencies	$	—		$	49
Obligations of state and political subdivisions		339			482
Residential mortgage-backed securities and collateralized mortgage obligations		226			108
Corporate securities		12			—
Commercial mortgage-backed securities		38			34
Total gross realized gains on sales of investment securities		615			673
Gross realized losses on sales of investment securities
U.S. government & agencies		(14	)		(16	)
Obligations of state and political subdivisions		(7	)		(95	)
Residential mortgage-backed securities and collateralized mortgage obligations		(112	)		(321	)
Commercial mortgage-backed securities		—			(54	)
Other asset-backed securities		—			(1	)
Total gross realized losses on sales of investment securities		(133	)		(487	)
Gains on sales of investment securities, net	$	482		$	186

Schedule of Unrealized Loss on Investments [Table Text Block]

	As of December 31, 2020
	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
(Amounts in thousands)	Value		Losses			Value		Losses			Value		Losses
Available-for-sale securities:
U.S. government & agencies	$	—	$	—		$	1,615	$	(8	)	$	1,615	$	(8	)
Obligations of state and political subdivisions		7,921		(29	)		—		—			7,921		(29	)
Residential mortgage-backed securities and collateralized mortgage obligations		68,512		(241	)		249		(5	)		68,761		(246	)
Commercial mortgage-backed securities		5,400		(18	)		—		—			5,400		(18	)
Other asset-backed securities		2,106		—			930		(1	)		3,036		(1	)
Total temporarily impaired securities	$	83,939	$	(288	)	$	2,794	$	(14	)	$	86,733	$	(302	)

	As of December 31, 2019
	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
(Amounts in thousands)	Value		Losses			Value		Losses			Value		Losses
Available-for-sale securities:
U.S. government & agencies	$	6,473	$	(25	)	$	380	$	(2	)	$	6,854	$	(27	)
Obligations of state and political subdivisions		2,249		(26	)		—		—			2,249		(26	)
Residential mortgage-backed securities and collateralized mortgage obligations		31,817		(206	)		22,166		(235	)		53,982		(442	)
Corporate securities		—		—			955		(45	)		955		(45	)
Commercial mortgage-backed securities		1,464		(1	)		4,549		(39	)		6,013		(40	)
Other asset-backed securities		3,011		(8	)		—		—			3,011		(8	)
Total temporarily impaired securities	$	45,014	$	(266	)	$	28,050	$	(321	)	$	73,064	$	(588	)