Note 5 - Loans Receivable and the Allowance for Loan Losses (Tables)

12 Months Ended

Dec. 31, 2017

Year ended December 31,	2017				2016
TDRs Subsequently Defaulted	Number of contracts		Recorded investment		Number of contracts		Recorded investment
Commercial:
Secured by residential real estate		—	$	—		1	$	111

Troubled Debt Restructuring [Member]

Allowance for Loan Losses

December 31,	2017				2016
	Unpaid principal balance		Related allowance		Unpaid principal balance		Related allowance
TDRs with no specific allowance recorded	$	3,448		—	$	3,992		—
TDRs with an allowance recorded		867	$	235		1,382	$	761
Total	$	4,315	$	235	$	5,374	$	761

Total Retail Loans [Member]

Major Classes of Loans

December 31,	2017		2016
Commercial:
Commercial and industrial	$	147,190	$	110,233
Construction		51,157		39,268
Secured by commercial real estate		286,867		255,188
Secured by residential real estate		71,703		68,731
State and political subdivisions		38,087		35,260
Retail:
1-4 family residential mortgages		55,818		47,124
Home equity loans and lines		75,576		71,525
Consumer		6,680		5,670
Total loans		733,078		632,999
Net unearned costs		205		80
Loans receivable	$	733,283	$	633,079

Internal Risk Ratings and Payment Activity

December 31, 2017	Pass		Special mention		Substandard		Doubtful		Total
Commercial:
Commercial and industrial	$	139,820	$	863	$	6,507	$	—	$	147,190
Construction		51,156		—		1		—		51,157
Secured by commercial real estate		268,069		10,569		8,229		—		286,867
Secured by residential real estate		69,571		222		1,910		—		71,703
State and political subdivisions		38,087		—		—		—		38,087
Total	$	566,703	$	11,654	$	16,647	$	—	$	595,004

December 31, 2016	Pass		Special mention		Substandard		Doubtful		Total
Commercial:
Commercial and industrial	$	102,396	$	686	$	7,151	$	—	$	110,233
Construction		39,259		—		9		—		39,268
Secured by commercial real estate		238,290		5,185		11,713		—		255,188
Secured by residential real estate		65,169		231		3,331		—		68,731
State and political subdivisions		35,260		—		—		—		35,260
Total	$	480,374	$	6,102	$	22,204	$	—	$	508,680

December 31, 2017	Performing		Non-performing		Total
Retail:
1-4 family residential mortgages	$	54,936	$	882	$	55,818
Home equity loans and lines		75,433		143		75,576
Consumer		6,595		85		6,680
Total	$	136,964	$	1,110	$	138,074

December 31, 2016	Performing		Non-performing		Total
Retail:
1-4 family residential mortgages	$	46,858	$	266	$	47,124
Home equity loans and lines		71,436		89		71,525
Consumer		5,577		93		5,670
Total	$	123,871	$	448	$	124,319

Past Due Loans

December 31, 2017	30-59 days past due		60-89 days past due		90 days or more past due		Total past due loans		Current		Total loans receivable
Commercial:
Commercial and industrial	$	25	$	429	$	57	$	511	$	146,679	$	147,190
Construction		—		—		—		—		51,157		51,157
Secured by commercial real estate		899		—		730		1,629		285,238		286,867
Secured by residential real estate		24		—		210		234		71,469		71,703
State and political subdivisions		—		—		—		—		38,087		38,087
Retail:
1-4 family residential mortgages		744		152		504		1,400		54,418		55,818
Home equity loans and lines		251		44		119		414		75,162		75,576
Consumer		23		8		—		31		6,649		6,680
Total	$	1,966	$	633	$	1,620	$	4,219	$	728,859	$	733,078

December 31, 2016	30-59 days past due		60-89 days past due		90 days or more past due		Total past due loans		Current		Total loans receivable
Commercial:
Commercial and industrial	$	463		—		—	$	463	$	109,770	$	110,233
Construction		214		—		—		214		39,054		39,268
Secured by commercial real estate		64	$	395	$	1,596		2,055		253,133		255,188
Secured by residential real estate		—		—		285		285		68,446		68,731
State and political subdivisions		—		—		—		—		35,260		35,260
Retail:
1-4 family residential mortgages		1,459		323		—		1,782		45,342		47,124
Home equity loans and lines		107		15		—		122		71,403		71,525
Consumer		14		2		—		16		5,654		5,670
Total	$	2,321	$	735	$	1,881	$	4,937	$	628,062	$	632,999

Non-accrual Loans

December 31, 2017	90 days or more past due (still accruing)		Non-accrual
Commercial:
Commercial and industrial	$	—	$	3,367
Construction		—		—
Secured by commercial real estate		—		1,987
Secured by residential real estate		—		1,458
State and political subdivisions		—		—
Retail:
1-4 family residential mortgages		—		882
Home equity loans and lines		—		142
Consumer		—		85
Total	$	—	$	7,921

December 31, 2016	90 days or more past due (still accruing)		Non-accrual
Commercial:
Commercial and industrial	$	—	$	4,798
Construction		—		—
Secured by commercial real estate		—		3,007
Secured by residential real estate		—		1,866
State and political subdivisions		—		—
Retail:
1-4 family residential mortgages		—		266
Home equity loans and lines		—		89
Consumer		—		93
Total	$	—	$	10,119

Allowance for Loan Losses

Year ended December 31, 2017	Balance, beginning of period		Provision for (credit to) loan losses			Charge-offs			Recoveries		Balance, end of period
Commercial:
Commercial and industrial	$	1,459	$	2,178		$	(960	)	$	34	$	2,711
Construction		449		114			—			—		563
Secured by commercial real estate		2,646		(244	)		—			8		2,410
Secured by residential real estate		1,760		(959	)		(23	)		38		816
State and political subdivisions		123		(9	)		—			—		114
Retail:
1-4 family residential mortgages		366		78			—			—		444
Home equity loans and lines		353		(6	)		—			10		357
Consumer		76		41			(92	)		32		57
Unallocated		162		207		N/A			N/A			369
Total	$	7,394	$	1,400		$	(1,075	)	$	122	$	7,841

Year ended December 31, 2016	Balance, beginning of period		Provision for (credit to) loan losses			Charge-offs			Recoveries		Balance, end of period
Commercial:
Commercial and industrial	$	1,521	$	41		$	(140	)	$	37	$	1,459
Construction		286		163			—			—		449
Secured by commercial real estate		2,411		227			—			8		2,646
Secured by residential real estate		1,812		(44	)		(120	)		112		1,760
State and political subdivisions		222		(99	)		—			—		123
Indirect lease financing		164		(121	)		(52	)		9		—
Retail:
1-4 family residential mortgages		350		16			—			—		366
Home equity loans and lines		428		(91	)		—			16		353
Consumer		76		60			(92	)		32		76
Unallocated		284		(122	)	N/A			N/A			162
Total	$	7,554	$	30		$	(404	)	$	214	$	7,394

Loans by Loan Class Modified as TDRs

Year ended December 31,	2017						2016
	Number of contracts		Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Number of contracts		Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment
Commercial:
Commercial and industrial		—	$	—	$	—		7	$	1,099	$	1,020
Secured by commercial real estate		—		—		—		2		1,296		1,251
Secured by residential real estate		—		—		—		5		1,156		1,126
Retail:
1-4 family residential mortgages		—		—		—		1		193		193
Consumer		—		—		—		1		96		93
Total		—	$	—	$	—		16	$	3,840	$	3,683

Loans Disaggregated by Impairment Method

	Allowance for Loan Losses						Loans Receivable
December 31, 2017	Balance		Balance related to loans individually evaluated for impairment		Balance related to loans collectively evaluated for impairment		Balance		Balance individually evaluated for impairment		Balance collectively evaluated for impairment
Commercial:
Commercial and industrial	$	2,711	$	1,260	$	1,451	$	147,190	$	6,498	$	140,692
Construction		563		—		563		51,157		1		51,156
Secured by commercial real estate		2,410		—		2,410		286,867		3,874		282,993
Secured by residential real estate		816		84		732		71,703		1,744		69,959
State and political subdivisions		114		—		114		38,087		—		38,087
Retail:
1-4 family residential mortgages		444		8		436		55,818		1,218		54,600
Home equity loans and lines		357		40		317		75,576		164		75,412
Consumer		57		—		57		6,680		85		6,595
Unallocated		369	N/A		N/A		N/A		N/A		N/A
Total	$	7,841	$	1,392	$	6,080	$	733,078	$	13,584	$	719,494

	Allowance for Loan Losses						Loans Receivable
December 31, 2016	Balance		Balance related to loans individually evaluated for impairment		Balance related to loans collectively evaluated for impairment		Balance		Balance individually evaluated for impairment		Balance collectively evaluated for impairment
Commercial:
Commercial and industrial	$	1,459	$	696	$	763	$	110,233	$	5,134	$	105,099
Construction		449		—		449		39,268		224		39,044
Secured by commercial real estate		2,646		—		2,646		255,188		6,383		248,805
Secured by residential real estate		1,760		494		1,266		68,731		2,313		66,418
State and political subdivisions		123		—		123		35,260		—		35,260
Retail:
1-4 family residential mortgages		366		8		358		47,124		748		46,376
Home equity loans and lines		353		—		353		71,525		111		71,414
Consumer		76		—		76		5,670		93		5,577
Unallocated		162	N/A		N/A		N/A		N/A		N/A
Total	$	7,394	$	1,198	$	6,034	$	632,999	$	15,006	$	617,993

Impaired Loans

	December 31, 2017						December 31, 2016
	Recorded investment (after charge-offs)		Unpaid principal balance		Related allowance		Recorded investment (after charge-offs)		Unpaid principal balance		Related allowance
With no specific allowance recorded:
Commercial:
Commercial and industrial	$	5,070	$	5,461	$	—	$	2,482	$	2,862	$	—
Construction		1		1		—		224		234		—
Secured by commercial real estate		3,874		4,464		—		6,383		6,367		—
Secured by residential real estate		914		1,239		—		1,046		1,438		—
Retail:
1-4 family residential mortgages		1,057		1,108		—		570		589		—
Home equity loans and lines		124		168		—		111		174		—
Consumer		85		90		—		93		95		—
Total	$	11,125	$	12,531	$	—	$	10,909	$	11,759	$	—

With an allowance recorded:
Commercial:
Commercial and industrial	$	1,428	$	2,593	$	1,260	$	2,652	$	2,812	$	696
Construction		—		—		—		—		—		—
Secured by commercial real estate		—		—		—		—		—		—
Secured by residential real estate		830		879		84		1,267		1,435		494
Retail:
1-4 family residential mortgages		161		163		8		178		193		8
Home equity loans and lines		40		41		40		—		—		—
Consumer		—		—		—		—		—		—
Total	$	2,459	$	3,676	$	1,392	$	4,097	$	4,440	$	1,198

Total:
Commercial:
Commercial and industrial	$	6,498	$	8,054	$	1,260	$	5,134	$	5,674	$	696
Construction		1		1		—		224		234		—
Secured by commercial real estate		3,874		4,464		—		6,383		6,367		—
Secured by residential real estate		1,744		2,118		84		2,313		2,873		494
Retail:
1-4 family residential mortgages		1,218		1,271		8		748		782		8
Home equity loans and lines		164		209		40		111		174		—
Consumer		85		90		—		93		95		—
Total	$	13,584	$	16,207	$	1,392	$	15,006	$	16,199	$	1,198

Year Ended December 31,	2017				2016				2015
	Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized		Average recorded investment		Interest income recognized
Commercial:
Commercial and industrial	$	5,301	$	14	$	4,200	$	58	$	6,108	$	169
Construction		51		2		370		18		396		20
Secured by commercial real estate		5,744		145		6,129		131		7,370		149
Secured by residential real estate		2,252		23		1,960		15		1,544		—
Indirect lease financing		—		—		88		—		43		1
Retail:
1-4 family residential mortgages		1,155		13		583		10		448		6
Home equity loans and lines		138		1		129		1		135		1
Consumer		97		—		29		—		2		—
Total	$	14,738	$	198	$	13,488	$	233	$	16,046	$	346