Note 4 - Investment Securities (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

Schedule of Investment Securities Available-for-sale and Held-to-Maturity [Table Text Block]

	Available-for-Sale
	December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	73,859	$	113	$	(1,517	)	$	72,455
Commercial		56,101		10		(1,822	)		54,289
Obligations of states and political subdivisions		5,617		51		(4	)		5,664
U.S. Treasury securities		79		—		—			79
Total	$	135,656	$	174	$	(3,343	)	$	132,487

	Held-to-Maturity
	December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	11,716	$	—	$	(349	)	$	11,367
Obligations of U.S. government-sponsored agencies		8,026		—		(244	)		7,782
Obligations of states and political subdivisions		1,720		—		(17	)		1,703
Total	$	21,462	$	—	$	(610	)	$	20,852

	Available-for-Sale
	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	83,360	$	286	$	(860	)	$	82,786
Commercial		67,281		27		(1,234	)		66,074
Obligations of states and political subdivisions		4,752		182		(3	)		4,931
U.S. Treasury securities		80		—		—			80
Total	$	155,473	$	495	$	(2,097	)	$	153,871

	Held-to-Maturity
	December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	15,065	$	1	$	(186	)	$	14,880
Obligations of U.S. government-sponsored agencies		9,326		7		(144	)		9,189
Obligations of states and political subdivisions		1,888		5		(13	)		1,880
Total	$	26,279	$	13	$	(343	)	$	25,949

Investments Classified by Contractual Maturity Date [Table Text Block]

	Available-for-Sale				Held-to-Maturity
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in Thousands)
Maturing within one year	$	1,083	$	1,084	$	—	$	—
Maturing after one to five years		36,800		36,227		1,081		1,077
Maturing after five to ten years		57,729		56,065		10,390		10,076
Maturing after ten years		40,044		39,111		9,991		9,699
Total	$	135,656	$	132,487	$	21,462	$	20,852

Schedule of Unrealized Loss on Investments [Table Text Block]

	Available-for-Sale
	December 31, 2018
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	9,417	$	(87	)	$	53,507	$	(1,430	)
Commercial		461		(3	)		53,430		(1,819	)
Obligations of states and political subdivisions		879		(2	)		420		(2	)
U.S. Treasury securities		79		—			—		—
Total	$	10,836	$	(92	)	$	107,357	$	(3,251	)

	Held-to-Maturity
	December 31, 2018
	Less than 12 Months				12 Months or More
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	—	$	—	$	11,367	$	(349	)
Obligations of U.S. government-sponsored agencies		—		—		7,782		(244	)
Obligations of states and political subdivisions		770		—		933		(17	)
Total	$	770	$	—	$	20,082	$	(610	)

	Available-for-Sale
	December 31, 2017
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Residential	$	47,007	$	(467	)	$	21,122	$	(393	)
Commercial		18,554		(180	)		46,312		(1,054	)
Obligations of states and political subdivisions		428		(3	)		—		—
U.S. Treasury securities		80		—			—		—
Total	$	66,069	$	(650	)	$	67,434	$	(1,447	)

	Held-to-Maturity
	December 31, 2017
	Less than 12 Months					12 Months or More
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(Dollars in Thousands)
Mortgage-backed securities:
Commercial	$	7,895	$	(63	)	$	6,675	$	(123	)
Obligations of U.S. government-sponsored agencies		865		(2	)		7,388		(142	)
Obligations of states and political subdivisions		571		(3	)		531		(10	)
Total	$	9,331	$	(68	)	$	14,594	$	(275	)