Note 3 - Investment Securities (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Marketable Securities [Table Text Block]

	September 30 , 2017
			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Available for sale
U.S. Treasuries and government agencies	$	4,999	$	--	$	(26	)	$	4,973
Municipal securities		94,028		900		(456	)		94,472
Residential m ortgage-backed securities		100,952		485		(710	)		100,727
Corporate debt securities		5,000		220		--			5,220
Total available for sale	$	204,979	$	1,605	$	(1,192	)	$	205,392
Held to maturity
Municipal securities	$	42,879	$	234	$	(667	)	$	42,446
Total held to maturity	$	42,879	$	234	$	(667	)	$	42,446

	December 31, 2016
			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gains		Losses			Value
Available for sale
U.S. Treasuries and government agencies	$	5,657	$	5	$	(31	)	$	5,631
Municipal securities		88,276		343		(1,569	)		87,050
Residential m ortgage-backed securities		96,870		348		(1,423	)		95,795
Total available for sale	$	190,803	$	696	$	(3,023	)	$	188,476
Held to maturity
Municipal securities	$	26,977	$	16	$	(1,903	)	$	25,090
Total held to maturity	$	26,977	$	16	$	(1,903	)	$	25,090

Schedule of Unrealized Loss on Investments [Table Text Block]

	September 30 , 2017
	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
U.S. Treasuries and government agencies	$	2,498	$	3	$	1,977	$	23	$	4,475	$	26
Municipal securities		33,349		491		14,814		632		48,163		1,123
Residential m ortgage-backed securities		33,989		202		25,884		508		59,873		710
Total	$	69,836	$	696	$	42,675	$	1,163	$	112,511	$	1,859

	December 31, 201 6
	Less than 12 Months				12 Months or More				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
U.S. Treasuries and government agencies	$	1,969	$	31	$	--	$	--	$	1,969	$	31
Municipal securities		73,194		3,472		--		--		73,194		3,472
Residential m ortgage-backed securities		78,725		1,423		--		--		78,725		1,423
Total	$	153,888	$	4,926	$	--	$	--	$	153,888	$	4,926

Investments Classified by Contractual Maturity Date [Table Text Block]

	September 30 , 2017
	Available for Sale							Held to Maturity
					Weighted							Weighted
	Amortized Cost		Fair Value		Average Rate			Amortized Cost		Fair Value		Average Rate
Within one year	$	5,857	$	5,860		1.65	%	$	--	$	--		--
Due from one year to five years		15,912		15,938		2.21	%		--		--		--
Due from five years to ten years		20,368		20,810		3.50	%		6,532		6,602		2.20	%
Due after ten years		61,890		62,057		2.90	%		36,347		35,844		2.80	%
		104,027		104,665		2.85	%		42,879		42,446		2.71	%
Residential m ortgage-backed securities		100,952		100,727		2.35	%		--		--		--
Total	$	204,979	$	205,392		2.60	%	$	42,879	$	42,446		2.71	%

Realized Gain (Loss) on Investments [Table Text Block]

	Three Months Ended September 30,					Nine Months Ended September 30,
	201 7		2016			201 7		2016
Sales proceeds	$	--	$	22,297		$	2,069	$	30,386
Gross realized gains	$	--	$	97		$	48	$	195
Gross realized losses		--		(76	)		--		(176	)
Net gains on sales of investment securities	$	--	$	21		$	48	$	19