Note 4 - Securities (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

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

	As of March 31, 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized			Estimated
(Amounts in thousands)	Cost		Gain		Loss			Fair Value
Available-for-sale securities:
U.S. government & agencies	$	12,558	$	12	$	(74	)	$	12,496
Obligations of state and political subdivisions		54,753		1,180		(270	)		55,663
Residential mortgage-backed securities and collateralized mortgage obligations		83,793		68		(1,469	)		82,392
Corporate securities		10,419		128		(99	)		10,448
Commercial mortgage-backed securities		16,815		7		(300	)		16,522
Other asset-backed securities		4,087		6		(80	)		4,013
Total	$	182,425	$	1,401	$	(2,292	)	$	181,534
Held-to-maturity securities:
Obligations of state and political subdivisions	$	31,257	$	870	$	(332	)	$	31,795

	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	$	2,062	$	2,067	$	—	$	—
After one year through five years		78,246		77,523		6,327		6,547
After five years through ten years		48,087		48,105		11,808		12,016
After ten years		54,030		53,839		13,122		13,232
Total	$	182,425	$	181,534	$	31,257	$	31,795

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	$	18,328	$	15,288	$	33,616
Federal Home Loan Bank of San Francisco borrowings		—		25,342		25,342
Total	$	18,328	$	40,630	$	58,958

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

	Three Months Ended March 31,
(Amounts in thousands)	2017			2016
Proceeds from sales of securities	$	13,927		$	19,934
Gross realized gains on sales of securities:
Obligations of state and political subdivisions	$	51		$	72
Residential mortgage-backed securities and collateralized mortgage obligations		17			—
Corporate securities		1			42
Commercial mortgage-backed securities		—			4
Other asset-backed securities		—			1
Total gross realized gains on sales of securities		69			119
Gross realized losses on sales of securities:
Corporate securities		(3	)		(25	)
Total gross realized losses on sales of securities		(3	)		(25	)
Gain on investment securities, net	$	66		$	94

Schedule of Unrealized Loss on Investments [Table Text Block]

	As of March 31, 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	$	9,204	$	(74	)	$	—	$	—		$	9,204	$	(74	)
Obligations of states and political subdivisions		15,993		(270	)		—		—			15,993		(270	)
Residential mortgage-backed securities and collateralized mortgage obligations		67,189		(1,273	)		7,355		(196	)		74,544		(1,469	)
Corporate securities		2,952		(99	)		—		—			2,952		(99	)
Commercial mortgage-backed securities		9,793		(146	)		6,136		(154	)		15,929		(300	)
Other asset-backed securities		2,180		(28	)		1,321		(52	)		3,501		(80	)
Total temporarily impaired securities	$	107,311	$	(1,890	)	$	14,812	$	(402	)	$	122,123	$	(2,292	)
Held-to-maturity securities:
Obligations of states and political subdivisions	$	10,824	$	(247	)	$	945	$	(85	)	$	11,769	$	(332	)

	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	)