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Note 5 - Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Sep. 30, 2018	Dec. 31, 2017
Beginning balance			$ 4,774	$ 4,856	$ 4,856
Charge-offs			(2,351)		(2,991)
Recoveries			544		922
Provision for loan losses	$ 789	$ 373	2,149	1,464	1,987
Ending balance	5,116		5,116		4,774
Allowance for loan losses individually evaluated for impairment						$ 178	$ 98
Allowance for loan losses collectively evaluated for impairment						4,938	4,676
Loans, allowance for loan losses	5,116		5,116	4,856	4,774	5,116	4,774
Loans individually evaluated for impairment						842	791
Loans collectively evaluated for impairment						528,118	356,667
Loans						531,198	357,458
Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						2,238
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Beginning balance			203	535	535
Charge-offs
Recoveries
Provision for loan losses			4		(332)
Ending balance	207		207		203
Allowance for loan losses individually evaluated for impairment						31
Allowance for loan losses collectively evaluated for impairment						176	203
Loans, allowance for loan losses	207		203	535	203	207	203
Loans individually evaluated for impairment						155
Loans collectively evaluated for impairment						43,273	26,143
Loans						43,501	26,143
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						73
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Beginning balance			290	411	411
Charge-offs			(82)		(28)
Recoveries			48		135
Provision for loan losses			87		(228)
Ending balance	343		343		290
Allowance for loan losses individually evaluated for impairment						51	5
Allowance for loan losses collectively evaluated for impairment						292	285
Loans, allowance for loan losses	343		290	411	290	343	290
Loans individually evaluated for impairment						58	187
Loans collectively evaluated for impairment						117,819	44,886
Loans						120,027	45,073
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						2,150
Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Beginning balance			116	88	88
Charge-offs
Recoveries
Provision for loan losses			11		28
Ending balance	127		127		116
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						127	116
Loans, allowance for loan losses	127		116	88	116	127	116
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						22,915	16,579
Loans						22,915	16,579
Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Beginning balance			777	903	903
Charge-offs
Recoveries			4		69
Provision for loan losses			42		(195)
Ending balance	823		823		777
Allowance for loan losses individually evaluated for impairment						7	21
Allowance for loan losses collectively evaluated for impairment						816	756
Loans, allowance for loan losses	823		777	903	777	823	777
Loans individually evaluated for impairment						517	532
Loans collectively evaluated for impairment						149,998	104,601
Loans						150,523	105,133
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						8
Real Estate [Member] | Other Real Estate Loans [Member]
Beginning balance			2	2	2
Charge-offs
Recoveries
Provision for loan losses
Ending balance	2		2		2
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						2	2
Loans, allowance for loan losses	2		2	2	2	2	2
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						1,093	190
Loans						1,100	190
Real Estate [Member] | Other Real Estate Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						7
Commercial and Industrial Loans [Member]
Beginning balance			1,049	527	527
Charge-offs			(2)		(16)
Recoveries			8		19
Provision for loan losses			97		519
Ending balance	1,152		1,152		1,049
Allowance for loan losses individually evaluated for impairment						67	72
Allowance for loan losses collectively evaluated for impairment						1,085	977
Loans, allowance for loan losses	1,152		1,049	527	1,049	1,152	1,049
Loans individually evaluated for impairment						67	72
Loans collectively evaluated for impairment						83,020	69,897
Loans						83,087	69,969
Commercial and Industrial Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans
Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Beginning balance			1,715	1,767	1,767
Charge-offs			(1,844)		(2,360)
Recoveries			409		601
Provision for loan losses			1,497		1,707
Ending balance	1,777		1,777		1,715
Allowance for loan losses individually evaluated for impairment						22
Allowance for loan losses collectively evaluated for impairment						1,755	1,715
Loans, allowance for loan losses	1,777		1,715	1,767	1,715	1,777	1,715
Loans individually evaluated for impairment						45
Loans collectively evaluated for impairment						38,995	39,300
Loans						39,040	39,300
Consumer Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans
Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Beginning balance			622	623	623
Charge-offs			(423)		(587)
Recoveries			75		98
Provision for loan losses			411		488
Ending balance	685		685		622
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						685	622
Loans, allowance for loan losses	685		622	623	622	685	622
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						71,005	55,071
Loans						71,005	55,071
Consumer Portfolio Segment [Member] | Indirect Sales [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans
FUSB [Member]
Beginning balance			2,447	2,409	2,409
Charge-offs			(14)		(79)
Recoveries			61		247
Provision for loan losses			215		(130)
Ending balance	2,709		2,709		2,447
Allowance for loan losses individually evaluated for impairment						178	98
Allowance for loan losses collectively evaluated for impairment						2,531	2,349
Loans, allowance for loan losses	2,709		2,709	2,409	2,447	2,709	2,447
Loans individually evaluated for impairment						842	791
Loans collectively evaluated for impairment						416,676	256,712
Loans						419,756	257,503
FUSB [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						2,238
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Beginning balance			203	535	535
Charge-offs
Recoveries
Provision for loan losses			4		(332)
Ending balance	207		207		203
Allowance for loan losses individually evaluated for impairment						31
Allowance for loan losses collectively evaluated for impairment						176	203
Loans, allowance for loan losses	207		203	535	203	207	203
Loans individually evaluated for impairment						155
Loans collectively evaluated for impairment						43,273	26,143
Loans						43,501	26,143
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						73
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Beginning balance			238	304	304
Charge-offs			(9)
Recoveries			36		103
Provision for loan losses			52		(169)
Ending balance	317		317		238
Allowance for loan losses individually evaluated for impairment						51	5
Allowance for loan losses collectively evaluated for impairment						266	233
Loans, allowance for loan losses	317		238	304	238	317	238
Loans individually evaluated for impairment						58	187
Loans collectively evaluated for impairment						109,347	34,085
Loans						111,555	34,272
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						2,150
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Beginning balance			116	88	88
Charge-offs
Recoveries
Provision for loan losses			11		28
Ending balance	127		127		116
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						127	116
Loans, allowance for loan losses	127		116	88	116	127	116
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						22,915	16,579
Loans						22,915	16,579
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Beginning balance			777	903	903
Charge-offs
Recoveries			4		69
Provision for loan losses			42		(195)
Ending balance	823		823		777
Allowance for loan losses individually evaluated for impairment						7	21
Allowance for loan losses collectively evaluated for impairment						816	756
Loans, allowance for loan losses	823		777	903	777	823	777
Loans individually evaluated for impairment						517	532
Loans collectively evaluated for impairment						149,998	104,601
Loans						150,523	105,133
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						8
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member]
Beginning balance			2	2	2
Charge-offs
Recoveries
Provision for loan losses
Ending balance	2		2		2
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						2	2
Loans, allowance for loan losses	2		2	2	2	2	2
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						1,093	190
Loans						1,100	190
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans						7
FUSB [Member] | Commercial and Industrial Loans [Member]
Beginning balance			1,049	527	527
Charge-offs			(2)		(16)
Recoveries			8		19
Provision for loan losses			97		519
Ending balance	1,152		1,152		1,049
Allowance for loan losses individually evaluated for impairment						67	72
Allowance for loan losses collectively evaluated for impairment						1,085	977
Loans, allowance for loan losses	1,152		1,049	527	1,049	1,152	1,049
Loans individually evaluated for impairment						67	72
Loans collectively evaluated for impairment						83,020	69,897
Loans						83,087	69,969
FUSB [Member] | Commercial and Industrial Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans
FUSB [Member] | Consumer Portfolio Segment [Member]
Loans						7,075	5,217
FUSB [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Beginning balance			62	50	50
Charge-offs			(3)		(63)
Recoveries			13		56
Provision for loan losses			9		19
Ending balance	81		81		62
Allowance for loan losses individually evaluated for impairment						22
Allowance for loan losses collectively evaluated for impairment						59	62
Loans, allowance for loan losses	81		62	50	62	81	62
Loans individually evaluated for impairment						45
Loans collectively evaluated for impairment						7,030	5,217
Loans						7,075	5,217
FUSB [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans
FUSB [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Beginning balance
Charge-offs
Recoveries
Provision for loan losses
Ending balance
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment
Loans, allowance for loan losses
Loans individually evaluated for impairment
Loans collectively evaluated for impairment
Loans
FUSB [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Ending balance
Loans, allowance for loan losses
Loans
ALC [Member]
Beginning balance			2,327	2,447	2,447
Charge-offs			(2,337)		(2,912)
Recoveries			483		675
Provision for loan losses			1,934		2,117
Ending balance	2,407		2,407		2,327
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						2,407	2,327
Loans, allowance for loan losses	2,407		2,407	2,447	2,327	2,407	2,327
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						111,442	99,955
Loans						111,442	99,955
ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member]
Beginning balance
Charge-offs
Recoveries
Provision for loan losses
Ending balance
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment
Loans, allowance for loan losses
Loans individually evaluated for impairment
Loans collectively evaluated for impairment
Loans
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member]
Beginning balance			52	107	107
Charge-offs			(73)		(28)
Recoveries			12		32
Provision for loan losses			35		(59)
Ending balance	26		26		52
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						26	52
Loans, allowance for loan losses	26		52	107	52	26	52
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						8,472	10,801
Loans						8,472	10,801
ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member]
Beginning balance
Charge-offs
Recoveries
Provision for loan losses
Ending balance
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment
Loans, allowance for loan losses
Loans individually evaluated for impairment
Loans collectively evaluated for impairment
Loans
ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member]
Beginning balance
Charge-offs
Recoveries
Provision for loan losses
Ending balance
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment
Loans, allowance for loan losses
Loans individually evaluated for impairment
Loans collectively evaluated for impairment
Loans
ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member]
Beginning balance
Charge-offs
Recoveries
Provision for loan losses
Ending balance
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment
Loans, allowance for loan losses
Loans individually evaluated for impairment
Loans collectively evaluated for impairment
Loans
ALC [Member] | Commercial and Industrial Loans [Member]
Beginning balance
Charge-offs
Recoveries
Provision for loan losses
Ending balance
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment
Loans, allowance for loan losses
Loans individually evaluated for impairment
Loans collectively evaluated for impairment
Loans
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member]
Beginning balance			1,653	1,717	1,717
Charge-offs			(1,841)		(2,297)
Recoveries			396		545
Provision for loan losses			1,488		1,688
Ending balance	1,696		1,696		1,653
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						1,696	1,653
Loans, allowance for loan losses	1,696		1,653	1,717	1,653	1,696	1,653
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						31,965	34,083
Loans						31,965	34,083
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member]
Beginning balance			622	623	623
Charge-offs			(423)		(587)
Recoveries			75		98
Provision for loan losses			411		488
Ending balance	685		685		622
Allowance for loan losses individually evaluated for impairment
Allowance for loan losses collectively evaluated for impairment						685	622
Loans, allowance for loan losses	$ 685		$ 622	$ 623	$ 622	685	622
Loans individually evaluated for impairment
Loans collectively evaluated for impairment						71,005	55,071
Loans						$ 71,005	$ 55,071

X

- Definition

Represents the amount of provision (reduction in reserve) for loan losses during the period.

+ References

No definition available.

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Amount of direct write-downs of accounts receivable charged against the allowance.

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-Name Accounting Standards Codification
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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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