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Note 4 - Loans and Allowance for Loan Losses - Schedule of Aging Analysis of Past Due Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Total loans	$ 341,657	$ 334,781
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Total loans	12,424	23,772
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Total loans	44,456	46,679
Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Total loans	16,702	16,627
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Total loans	113,037	102,112
Real Estate [Member] | Other Real Estate Loans [Member]
Total loans	226	234
Commercial and Industrial Loans [Member]
Total loans	65,087	57,963
Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Total loans	37,591	42,619
Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Total loans	52,134	44,775
FUSB [Member]
Accruing loans past due 90 days or more amounted
Total past due	203	1,268
Current	245,171	238,601
Total loans	245,374	239,869
FUSB [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total past due	45	245
FUSB [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due	57	926
FUSB [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total past due	101	97
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Accruing loans past due 90 days or more amounted
Total past due		86
Current	12,424	23,686
Total loans	12,424	23,772
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total past due		86
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Accruing loans past due 90 days or more amounted
Total past due	123	378
Current	32,104	32,577
Total loans	32,227	32,955
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total past due	45	145
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due	32	164
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total past due	46	69
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Accruing loans past due 90 days or more amounted
Current	16,702	16,627
Total loans	16,702	16,627
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Accruing loans past due 90 days or more amounted
Total past due		762
Current	113,037	101,350
Total loans	113,037	102,112
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due		762
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member]
Accruing loans past due 90 days or more amounted
Current	226	234
Total loans	226	234
FUSB [Member] | Commercial and Industrial Loans [Member]
Accruing loans past due 90 days or more amounted
Total past due	53	14
Current	65,034	57,949
Total loans	65,087	57,963
FUSB [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total past due		14
FUSB [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due	22
FUSB [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total past due	31
FUSB [Member] | Consumer Portfolio Segment [Member]
Accruing loans past due 90 days or more amounted
Total past due	27	28
Current	5,644	6,178
Total loans	5,671	6,206
FUSB [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due	3
FUSB [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total past due	24	28
FUSB [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Total loans	5,671	6,206
FUSB [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Total loans
ALC [Member]
Accruing loans past due 90 days or more amounted
Total past due	2,800	3,080
Current	93,483	91,832
Total loans	96,283	94,912
ALC [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total past due	1,394	1,806
ALC [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due	850	693
ALC [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total past due	556	581
ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Accruing loans past due 90 days or more amounted
Total loans
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Accruing loans past due 90 days or more amounted
Total past due	328	303
Current	11,901	13,421
Total loans	12,229	13,724
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total past due	180	213
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due	65	61
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total past due	83	29
ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Accruing loans past due 90 days or more amounted
Current
Total loans
ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Accruing loans past due 90 days or more amounted
Current
Total loans
ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member]
Accruing loans past due 90 days or more amounted
Current
Total loans
ALC [Member] | Commercial and Industrial Loans [Member]
Accruing loans past due 90 days or more amounted
Current
Total loans
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Accruing loans past due 90 days or more amounted
Total past due	1,589	1,958
Current	30,331	34,455
Total loans	31,920	36,413
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total past due	742	1,104
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due	545	441
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total past due	302	413
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Accruing loans past due 90 days or more amounted
Total past due	883	819
Current	51,251	43,956
Total loans	52,134	44,775
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total past due	472	489
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total past due	240	191
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total past due	$ 171	$ 139

X

- Definition

Recorded investment in financing receivables that are 90 days or more past due and still accruing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

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