Note 4 - Securities (Tables)

6 Months Ended

Jun. 30, 2017

Notes Tables

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

	As of June 30, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Cost		Gain		Loss			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	24,220	$	70	$	(59	)	$	24,231
Obligations of state and political subdivisions		57,076		1,430		(106	)		58,400
Residential mortgage-backed securities and collateralized mortgage obligations		91,842		244		(711	)		91,375
Corporate securities		8,268		132		(88	)		8,312
Commercial mortgage-backed securities		23,584		22		(185	)		23,421
Other asset-backed securities		3,937		8		(75	)		3,870
Total	$	208,927	$	1,906	$	(1,224	)	$	209,609
Held-to-maturity securities:
Obligations of state and political subdivisions	$	31,329	$	1,287	$	(67	)	$	32,549

	As of December 31, 2016
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Cost		Gain		Loss			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	10,427	$	10	$	(83	)	$	10,354
Obligations of state and political subdivisions		58,847		1,001		(420	)		59,428
Residential mortgage-backed securities and collateralized mortgage obligations		71,068		33		(1,497	)		69,604
Corporate securities		16,153		103		(140	)		16,116
Commercial mortgage-backed securities		15,786		9		(281	)		15,514
Other asset-backed securities		4,237		8		(87	)		4,158
Total	$	176,518	$	1,164	$	(2,508	)	$	175,174
Held-to-maturity securities:
Obligations of state and political subdivisions	$	31,187	$	710	$	(523	)	$	31,374

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

	Available-For-Sale				Held-To-Maturity
(Amounts in thousands)	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Amounts maturing in:
One year or less	$	1,426	$	1,430	$	—	$	—
After one year through five years		58,755		58,692		6,750		7,048
After five years through ten years		72,341		72,954		11,448		11,889
After ten years		76,405		76,533		13,131		13,612
Total	$	208,927	$	209,609	$	31,329	$	32,549

Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

(Amounts in thousands)	Pledged		Available To Be Pledged		Total Held For Pledging Purposes
Public funds collateral	$	18,799	$	15,344	$	34,143
Federal Home Loan Bank of San Francisco borrowings		—		24,250		24,250
Total	$	18,799	$	39,594	$	58,393

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

	Three Months Ended June 30,						Six Months Ended June 30,
(Amounts in thousands)	2017			2016			2017			2016
Proceeds from sales of securities	$	13,326		$	14,455		$	27,252		$	34,389
Gross realized gains on sales of securities:
U.S. government & agencies	$	—		$	8		$	—		$	8
Obligations of state and political subdivisions		30			40			81			111
Residential mortgage-backed securities and collateralized mortgage obligations		19			2			37			2
Corporate securities		9			33			10			76
Commercial mortgage-backed securities		—			—			—			4
Other asset-backed securities		—			13			—			14
Total gross realized gains on sales of securities		58			96			128			215
Gross realized losses on sales of securities:
U.S. government & agencies		—			(4	)		—			(4	)
Residential mortgage-backed securities and collateralized mortgage obligations		(23	)		(64	)		(24	)		(64	)
Corporate securities		—			—			(3	)		(25	)
Total gross realized losses on sales of securities		(23	)		(68	)		(27	)		(93	)
Gain on investment securities, net	$	35		$	28		$	101		$	122

Schedule of Unrealized Loss on Investments [Table Text Block]

	As of June 30, 2017
	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	$	8,259	$	(59	)	$	—	$	—		$	8,259	$	(59	)
Obligations of states and political subdivisions		10,757		(106	)		—		—			10,757		(106	)
Residential mortgage-backed securities and collateralized mortgage obligations		45,078		(529	)		8,244		(182	)		53,322		(711	)
Corporate securities		2,959		(88	)		—		—			2,959		(88	)
Commercial mortgage-backed securities		15,996		(94	)		4,291		(91	)		20,287		(185	)
Other asset-backed securities		2,150		(21	)		1,267		(54	)		3,417		(75	)
Total temporarily impaired securities	$	85,199	$	(897	)	$	13,802	$	(327	)	$	99,001	$	(1,224	)
Held-to-maturity securities:
Obligations of states and political subdivisions	$	2,037	$	(25	)	$	989	$	(42	)	$	3,026	$	(67	)

	As of December 31, 2016
	Less Than 12 Months					12 Months or More					Total
	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
(Amounts in thousands)	Value		Loss			Value		Loss			Value		Loss
Available-for-sale securities:
U.S. government & agencies	$	9,139	$	(83	)	$	—	$	—		$	9,139	$	(83	)
Obligations of states and political subdivisions		20,329		(420	)		—		—			20,329		(420	)
Residential mortgage-backed securities and collateralized mortgage obligations		52,345		(1,396	)		4,108		(101	)		56,453		(1,497	)
Corporate securities		8,908		(140	)		—		—			8,908		(140	)
Commercial mortgage-backed securities		12,041		(191	)		2,849		(90	)		14,890		(281	)
Other asset-backed securities		2,280		(28	)		1,346		(59	)		3,626		(87	)
Total temporarily impaired securities	$	105,042	$	(2,258	)	$	8,303	$	(250	)	$	113,345	$	(2,508	)
Held-to-maturity securities:
Obligations of states and political subdivisions	$	11,639	$	(425	)	$	933	$	(98	)	$	12,572	$	(523	)