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Note 4 - Loans and Allowance for Loan Losses - Changes in Allowance for Loan Losses and Recorded Investment in Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017 | Mar. 31, 2018 | Dec. 31, 2017
Beginning balance | $ 4,774 |  |  |  |
Provision for loan losses | 658 | $ 515 |  |  |
Ending balance | 4,829 |  | $ 4,774 |  |
Total allowance for loan losses | 4,829 |  | 4,774 | $ 4,829 | $ 4,774
Total loans receivable |  |  |  | 365,003 | 357,458
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |  |  |  |
Total loans receivable |  |  |  | 25,965 | 26,143
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |  |  |  |
Total loans receivable |  |  |  | 46,581 | 45,073
Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |  |
Total loans receivable |  |  |  | 16,396 | 16,579
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |  |  |  |
Total loans receivable |  |  |  | 111,546 | 105,133
Real Estate [Member] | Other Real Estate Loans [Member] |  |  |  |  |
Total loans receivable |  |  |  | 188 | 190
Commercial and Industrial Loans [Member] |  |  |  |  |
Total loans receivable |  |  |  | 65,996 | 69,969
Consumer Portfolio Segment [Member] | Consumer Loans [Member] |  |  |  |  |
Total loans receivable |  |  |  | 38,174 | 39,300
Consumer Portfolio Segment [Member] | Indirect Sales [Member] |  |  |  |  |
Total loans receivable |  |  |  | 60,157 | 55,071
FUSB [Member] |  |  |  |  |
Beginning balance | 2,447 | 2,409 | 2,409 |  |
Charge-offs | (8) |  | (79) |  |
Recoveries | 22 |  | 247 |  |
Provision for loan losses | 39 |  | (130) |  |
Ending balance | 2,500 |  | 2,447 |  |
Individually evaluated for impairment |  |  |  | 88 | 98
Collectively evaluated for impairment |  |  |  | 2,412 | 2,349
Total allowance for loan losses | 2,500 | 2,409 | 2,447 | 2,500 | 2,447
Individually evaluated for impairment |  |  |  | 779 | 791
Collectively evaluated for impairment |  |  |  | 261,346 | 256,712
Total loans receivable |  |  |  | 262,125 | 257,503
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 | (7) |  | (332) |  |
Ending balance | 196 |  | 203 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 196 | 203
Total allowance for loan losses | 203 | 535 | 203 | 196 | 203
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 25,965 | 26,143
Total loans receivable |  |  |  | 25,965 | 26,143
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |  |  |  |
Beginning balance | 238 | 304 | 304 |  |
Charge-offs | (8) |  |  |  |
Recoveries | 10 |  | 103 |  |
Provision for loan losses | 14 |  | (169) |  |
Ending balance | 254 |  | 238 |  |
Individually evaluated for impairment |  |  |  | 5 | 5
Collectively evaluated for impairment |  |  |  | 249 | 233
Total allowance for loan losses | 238 | 304 | 238 | 254 | 238
Individually evaluated for impairment |  |  |  | 186 | 187
Collectively evaluated for impairment |  |  |  | 36,432 | 34,085
Total loans receivable |  |  |  | 36,618 | 34,272
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |  |
Beginning balance | 116 | 88 | 88 |  |
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for loan losses | (1) |  | 28 |  |
Ending balance | 115 |  | 116 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 115 | 116
Total allowance for loan losses | 116 | 88 | 116 | 115 | 116
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 16,396 | 16,579
Total loans receivable |  |  |  | 16,396 | 16,579
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |  |  |  |
Beginning balance | 777 | 903 | 903 |  |
Charge-offs |  |  |  |  |
Recoveries | 3 |  | 69 |  |
Provision for loan losses | 18 |  | (195) |  |
Ending balance | 798 |  | 777 |  |
Individually evaluated for impairment |  |  |  | 14 | 21
Collectively evaluated for impairment |  |  |  | 784 | 756
Total allowance for loan losses | 777 | 903 | 777 | 798 | 777
Individually evaluated for impairment |  |  |  | 524 | 532
Collectively evaluated for impairment |  |  |  | 111,022 | 104,601
Total loans receivable |  |  |  | 111,546 | 105,133
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 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 2 | 2
Total allowance for loan losses | 2 | 2 | 2 | 2 | 2
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 188 | 190
Total loans receivable |  |  |  | 188 | 190
FUSB [Member] | Commercial and Industrial Loans [Member] |  |  |  |  |
Beginning balance | 1,049 | 527 | 527 |  |
Charge-offs |  |  | (16) |  |
Recoveries | 5 |  | 19 |  |
Provision for loan losses | 36 |  | 519 |  |
Ending balance | 1,090 |  | 1,049 |  |
Individually evaluated for impairment |  |  |  | 69 | 72
Collectively evaluated for impairment |  |  |  | 1,021 | 977
Total allowance for loan losses | 1,049 | 527 | 1,049 | 1,090 | 1,049
Individually evaluated for impairment |  |  |  | 69 | 72
Collectively evaluated for impairment |  |  |  | 65,927 | 69,897
Total loans receivable |  |  |  | 65,996 | 69,969
FUSB [Member] | Consumer Portfolio Segment [Member] |  |  |  |  |
Total loans receivable |  |  |  | 5,416 | 5,217
FUSB [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] |  |  |  |  |
Beginning balance | 62 | 50 | 50 |  |
Charge-offs |  |  | (63) |  |
Recoveries | 4 |  | 56 |  |
Provision for loan losses | (21) |  | 19 |  |
Ending balance | 45 |  | 62 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 45 | 62
Total allowance for loan losses | 62 | 50 | 62 | 45 | 62
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 5,416 | 5,217
Total loans receivable |  |  |  | 5,416 | 5,217
FUSB [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for loan losses |  |  |  |  |
Ending balance |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total loans receivable |  |  |  |  |
ALC [Member] |  |  |  |  |
Beginning balance | 2,327 | 2,447 | 2,447 |  |
Charge-offs | (765) |  | (2,912) |  |
Recoveries | 148 |  | 675 |  |
Provision for loan losses | 619 |  | 2,117 |  |
Ending balance | 2,329 |  | 2,327 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 2,329 | 2,327
Total allowance for loan losses | 2,329 | 2,447 | 2,327 | 2,329 | 2,327
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 102,878 | 99,955
Total loans receivable |  |  |  | 102,878 | 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 |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total loans receivable |  |  |  |  |
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |  |  |  |
Beginning balance | 52 | 107 | 107 |  |
Charge-offs | (14) |  | (28) |  |
Recoveries | 5 |  | 32 |  |
Provision for loan losses | (7) |  | (59) |  |
Ending balance | 36 |  | 52 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 36 | 52
Total allowance for loan losses | 52 | 107 | 52 | 36 | 52
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 9,963 | 10,801
Total loans receivable |  |  |  | 9,963 | 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 |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total loans receivable |  |  |  |  |
ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for loan losses |  |  |  |  |
Ending balance |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total loans receivable |  |  |  |  |
ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for loan losses |  |  |  |  |
Ending balance |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total loans receivable |  |  |  |  |
ALC [Member] | Commercial and Industrial Loans [Member] |  |  |  |  |
Beginning balance |  |  |  |  |
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for loan losses |  |  |  |  |
Ending balance |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total allowance for loan losses |  |  |  |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  |  |
Total loans receivable |  |  |  |  |
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] |  |  |  |  |
Beginning balance | 1,653 | 1,717 | 1,717 |  |
Charge-offs | (604) |  | (2,297) |  |
Recoveries | 122 |  | 545 |  |
Provision for loan losses | 481 |  | 1,688 |  |
Ending balance | 1,652 |  | 1,653 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 1,652 | 1,653
Total allowance for loan losses | 1,653 | 1,717 | 1,653 | 1,652 | 1,653
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 32,758 | 34,083
Total loans receivable |  |  |  | 32,758 | 34,083
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] |  |  |  |  |
Beginning balance | 622 | 623 | 623 |  |
Charge-offs | (147) |  | (587) |  |
Recoveries | 21 |  | 98 |  |
Provision for loan losses | 145 |  | 488 |  |
Ending balance | 641 |  | 622 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 641 | 622
Total allowance for loan losses | 622 | 623 | 622 | 641 | 622
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 60,157 | 55,071
Total loans receivable |  |  |  | 60,157 | 55,071
FUSB and ALC [Member] |  |  |  |  |
Beginning balance | 4,774 | 4,856 | 4,856 |  |
Charge-offs | (773) |  | (2,991) |  |
Recoveries | 170 |  | 922 |  |
Provision for loan losses | 658 |  | 1,987 |  |
Ending balance | 4,829 |  | 4,774 |  |
Individually evaluated for impairment |  |  |  | 88 | 98
Collectively evaluated for impairment |  |  |  | 4,741 | 4,676
Total allowance for loan losses | 4,774 | 4,856 | 4,774 | 4,829 | 4,774
Individually evaluated for impairment |  |  |  | 779 | 791
Collectively evaluated for impairment |  |  |  | 364,224 | 356,667
Total loans receivable |  |  |  | 365,003 | 357,458
FUSB and ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |  |  |  |
Beginning balance | 203 | 535 | 535 |  |
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for loan losses | (7) |  | (332) |  |
Ending balance | 196 |  | 203 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 196 | 203
Total allowance for loan losses | 203 | 535 | 203 | 196 | 203
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 25,965 | 26,143
Total loans receivable |  |  |  | 25,965 | 26,143
FUSB and ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |  |  |  |
Beginning balance | 290 | 411 | 411 |  |
Charge-offs | (22) |  | (28) |  |
Recoveries | 15 |  | 135 |  |
Provision for loan losses | 7 |  | (228) |  |
Ending balance | 290 |  | 290 |  |
Individually evaluated for impairment |  |  |  | 5 | 5
Collectively evaluated for impairment |  |  |  | 285 | 285
Total allowance for loan losses | 290 | 411 | 290 | 290 | 290
Individually evaluated for impairment |  |  |  | 186 | 187
Collectively evaluated for impairment |  |  |  | 46,395 | 44,886
Total loans receivable |  |  |  | 46,581 | 45,073
FUSB and ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |  |
Beginning balance | 116 | 88 | 88 |  |
Charge-offs |  |  |  |  |
Recoveries |  |  |  |  |
Provision for loan losses | (1) |  | 28 |  |
Ending balance | 115 |  | 116 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 115 | 116
Total allowance for loan losses | 116 | 88 | 116 | 115 | 116
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 16,396 | 16,579
Total loans receivable |  |  |  | 16,396 | 16,579
FUSB and ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |  |  |  |
Beginning balance | 777 | 903 | 903 |  |
Charge-offs |  |  |  |  |
Recoveries | 3 |  | 69 |  |
Provision for loan losses | 18 |  | (195) |  |
Ending balance | 798 |  | 777 |  |
Individually evaluated for impairment |  |  |  | 14 | 21
Collectively evaluated for impairment |  |  |  | 784 | 756
Total allowance for loan losses | 777 | 903 | 777 | 798 | 777
Individually evaluated for impairment |  |  |  | 524 | 532
Collectively evaluated for impairment |  |  |  | 111,022 | 104,601
Total loans receivable |  |  |  | 111,546 | 105,133
FUSB and ALC [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 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 2 | 2
Total allowance for loan losses | 2 | 2 | 2 | 2 | 2
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 188 | 190
Total loans receivable |  |  |  | 188 | 190
FUSB and ALC [Member] | Commercial and Industrial Loans [Member] |  |  |  |  |
Beginning balance | 1,049 | 527 | 527 |  |
Charge-offs |  |  | (16) |  |
Recoveries | 5 |  | 19 |  |
Provision for loan losses | 36 |  | 519 |  |
Ending balance | 1,090 |  | 1,049 |  |
Individually evaluated for impairment |  |  |  | 69 | 72
Collectively evaluated for impairment |  |  |  | 1,021 | 977
Total allowance for loan losses | 1,049 | 527 | 1,049 | 1,090 | 1,049
Individually evaluated for impairment |  |  |  | 69 | 72
Collectively evaluated for impairment |  |  |  | 65,927 | 69,897
Total loans receivable |  |  |  | 65,996 | 69,969
FUSB and ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] |  |  |  |  |
Beginning balance | 1,715 | 1,767 | 1,767 |  |
Charge-offs | (604) |  | (2,360) |  |
Recoveries | 126 |  | 601 |  |
Provision for loan losses | 460 |  | 1,707 |  |
Ending balance | 1,697 |  | 1,715 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 1,697 | 1,715
Total allowance for loan losses | 1,715 | 1,767 | 1,715 | 1,697 | 1,715
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 38,174 | 39,300
Total loans receivable |  |  |  | 38,174 | 39,300
FUSB and ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] |  |  |  |  |
Beginning balance | 622 | 623 | 623 |  |
Charge-offs | (147) |  | (587) |  |
Recoveries | 21 |  | 98 |  |
Provision for loan losses | 145 |  | 488 |  |
Ending balance | 641 |  | 622 |  |
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 641 | 622
Total allowance for loan losses | $ 622 | $ 623 | $ 622 | 641 | 622
Individually evaluated for impairment |  |  |  |  |
Collectively evaluated for impairment |  |  |  | 60,157 | 55,071
Total loans receivable |  |  |  | $ 60,157 | $ 55,071

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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