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Note 5 - Loans and Allowance for Loan Losses - Aging Analysis of Past Due Loans (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Loans		$ 522,260	$ 525,870
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Loans		27,521	41,340
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Loans		103,354	110,756
Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Loans		28,033	23,009
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Loans		158,748	156,162
Real Estate [Member] | Other Real Estate Loans [Member]
Loans		880	1,308
Commercial and Industrial Loans [Member]
Loans	[1]	91,489	85,779
Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Loans		37,160	38,583
Consumer Portfolio Segment [Member] | Branch Retail [Member]
Loans		29,609	28,324
Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Loans		45,466	40,609
FUSB [Member]
Total past due		1,263	6,214
Current		409,454	411,282
Loans		410,717	417,496
Accruing loans past due 90 days or more amounted
FUSB [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		833	4,552
FUSB [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due		392	661
FUSB [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		38	1,001
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Total past due			1,071
Current		27,521	40,269
Loans		27,521	41,340
Accruing loans past due 90 days or more amounted
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due			415
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due			582
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due			74
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Total past due		554	1,566
Current		96,251	101,405
Loans		96,805	102,971
Accruing loans past due 90 days or more amounted
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		185	991
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due		369	36
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due			539
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Current		28,033	23,009
Loans		28,033	23,009
Accruing loans past due 90 days or more amounted
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Total past due		480	471
Current		158,268	155,691
Loans		158,748	156,162
Accruing loans past due 90 days or more amounted
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		470	458
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due			13
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		10
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member]
Total past due		10
Current		870	1,308
Loans		880	1,308
Accruing loans past due 90 days or more amounted
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		10
FUSB [Member] | Commercial and Industrial Loans [Member]
Total past due		116	3,022
Current		91,373	82,757
Loans	[1]	91,489	85,779
Accruing loans past due 90 days or more amounted
FUSB [Member] | Commercial and Industrial Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		116	2,608
FUSB [Member] | Commercial and Industrial Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due			30
FUSB [Member] | Commercial and Industrial Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due			384
FUSB [Member] | Consumer Portfolio Segment [Member]
Total past due		103	84
Current		7,138	6,843
Loans		7,241	6,927
Accruing loans past due 90 days or more amounted
FUSB [Member] | Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		62	80
FUSB [Member] | Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due		23
FUSB [Member] | Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		18	4
FUSB [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Loans		7,241	6,927
FUSB [Member] | Consumer Portfolio Segment [Member] | Branch Retail [Member]
Loans
FUSB [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Loans
ALC [Member]
Total past due		2,010	2,796
Current		109,533	105,578
Loans		111,543	108,374
Accruing loans past due 90 days or more amounted
ALC [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		780	971
ALC [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due		393	596
ALC [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		837	1,229
ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Loans
Accruing loans past due 90 days or more amounted
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Total past due		232	253
Current		6,317	7,532
Loans		6,549	7,785
Accruing loans past due 90 days or more amounted
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		65	60
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due		56	65
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		111	128
ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Current
Loans
Accruing loans past due 90 days or more amounted
ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Current
Loans
Accruing loans past due 90 days or more amounted
ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member]
Current
Loans
Accruing loans past due 90 days or more amounted
ALC [Member] | Commercial and Industrial Loans [Member]
Current
Loans	[1]
Accruing loans past due 90 days or more amounted
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Total past due		1,151	1,747
Current		28,768	29,909
Loans		29,919	31,656
Accruing loans past due 90 days or more amounted
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		369	563
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due		272	354
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		510	830
ALC [Member] | Consumer Portfolio Segment [Member] | Branch Retail [Member]
Total past due		319	415
Current		29,290	27,909
Loans		29,609	28,324
Accruing loans past due 90 days or more amounted
ALC [Member] | Consumer Portfolio Segment [Member] | Branch Retail [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		154	164
ALC [Member] | Consumer Portfolio Segment [Member] | Branch Retail [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due		55	98
ALC [Member] | Consumer Portfolio Segment [Member] | Branch Retail [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		110	153
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Total past due		308	381
Current		45,158	40,228
Loans		45,466	40,609
Accruing loans past due 90 days or more amounted
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total past due		192	184
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total past due		10	79
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total past due		$ 106	$ 118
[1] Includes equipment financing leases.

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