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Note 6 - Loans and Allowance for Loan Losses - Schedule of Aging Analysis of Past Due Loans (Details) - USD ($) | Sep. 30, 2016 | Dec. 31, 2015
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FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | $ 0
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
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 | 86,000 | 86,000
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |
Total past due | 86,000 | 86,000
Current | 24,524,000 | 11,741,000
Total loans | 24,610,000 | 11,827,000
Accruing loans past due 90 days or more amounted |  | 0
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 | 61,000 | 118,000
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 | 15,000 | 206,000
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 | 208,000 | 360,000
FUSB [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |
Total past due | 284,000 | 684,000
Current | 32,275,000 | 30,046,000
Total loans | 32,559,000 | 30,730,000
Accruing loans past due 90 days or more amounted |  | 0
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |
Total past due |  | 0
Current | 16,801,000 | 11,845,000
Total loans | 16,801,000 | 11,845,000
Accruing loans past due 90 days or more amounted |  | 0
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 |  | 530,000
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 148,000
FUSB [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |
Total past due |  | 678,000
Current | 97,859,000 | 83,205,000
Total loans | 97,859,000 | 83,883,000
Accruing loans past due 90 days or more amounted |  | 0
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member] |  |
Total past due |  | 0
Current | 185,000 | 115,000
Total loans | 185,000 | 115,000
Accruing loans past due 90 days or more amounted |  | 0
FUSB [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due | 26,000 | 22,000
FUSB [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due | 17,000 | 52,000
FUSB [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Commercial and Industrial Loans [Member] |  |
Total past due | 43,000 | 74,000
Current | 54,416,000 | 29,303,000
Total loans | 54,459,000 | 29,377,000
Accruing loans past due 90 days or more amounted |  | 0
FUSB [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due | 30,000 | 49,000
FUSB [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 4,000
FUSB [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due | 9,000 | 83,000
FUSB [Member] | Consumer Portfolio Segment [Member] |  |
Total past due | 39,000 | 136,000
Current | 6,250,000 | 6,921,000
Total loans | 6,289,000 | 7,057,000
Accruing loans past due 90 days or more amounted |  | 0
FUSB [Member] | Other Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Other Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Other Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
FUSB [Member] | Other Loans [Member] |  |
Total past due |  | 0
Current | 46,000 | 379,000
Total loans | 46,000 | 379,000
Accruing loans past due 90 days or more amounted |  | 0
FUSB [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due | 117,000 | 719,000
FUSB [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due | 32,000 | 262,000
FUSB [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due | 303,000 | 677,000
FUSB [Member] |  |
Total past due | 452,000 | 1,658,000
Current | 232,356,000 | 173,555,000
Total loans | 232,808,000 | 175,213,000
Accruing loans past due 90 days or more amounted |  | 0
ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
ALC [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 |  | 0
ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |
Total past due |  | 0
Current |  | 0
Total loans |  |
Accruing loans past due 90 days or more amounted |  | 0
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 | 55,000 | 91,000
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 | 20,000 | 206,000
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 | 244,000 | 252,000
ALC [Member] | Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |
Total past due | 319,000 | 549,000
Current | 14,143,000 | 16,684,000
Total loans | 14,462,000 | 17,233,000
Accruing loans past due 90 days or more amounted |  | 0
ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |
Total past due |  | 0
Current |  | 0
Total loans |  |
Accruing loans past due 90 days or more amounted |  | 0
ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |
Total past due |  | 0
Current |  | 0
Total loans |  |
Accruing loans past due 90 days or more amounted |  | 0
ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Real Estate [Member] | Other Real Estate Loans [Member] |  |
Total past due |  | 0
Current |  | 0
Total loans |  |
Accruing loans past due 90 days or more amounted |  | 0
ALC [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Commercial and Industrial Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Commercial and Industrial Loans [Member] |  |
Total past due |  | 0
Current |  | 0
Total loans |  |
Accruing loans past due 90 days or more amounted |  | 0
ALC [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due | 900,000 | 965,000
ALC [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due | 504,000 | 567,000
ALC [Member] | Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due | 1,247,000 | 1,377,000
ALC [Member] | Consumer Portfolio Segment [Member] |  |
Total past due | 2,651,000 | 2,909,000
Current | 78,264,000 | 73,222,000
Total loans | 80,915,000 | 76,131,000
Accruing loans past due 90 days or more amounted |  | 0
ALC [Member] | Other Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Other Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Other Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due |  | 0
ALC [Member] | Other Loans [Member] |  |
Total past due |  | 0
Current |  | 0
Total loans |  |
Accruing loans past due 90 days or more amounted |  | 0
ALC [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Total past due | 955,000 | 1,056,000
ALC [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Total past due | 524,000 | 773,000
ALC [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |
Total past due | 1,491,000 | 1,629,000
ALC [Member] |  |
Total past due | 2,970,000 | 3,458,000
Current | 92,407,000 | 89,906,000
Total loans | 95,377,000 | 93,364,000
Accruing loans past due 90 days or more amounted |  | 0
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |
Total loans | 24,610,000 | 11,827,000
Real Estate [Member] | Secured by 1-4 Family Residential Properties [Member] |  |
Total loans | 47,021,000 | 47,963,000
Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |
Total loans | 16,801,000 | 11,845,000
Real Estate [Member] | Secured by Non-farm, Non-residential Properties [Member] |  |
Total loans | 97,859,000 | 83,883,000
Real Estate [Member] | Other Real Estate Loans [Member] |  |
Total loans | 185,000 | 115,000
Commercial and Industrial Loans [Member] |  |
Total loans | 54,459,000 | 29,377,000
Consumer Portfolio Segment [Member] |  |
Total loans | 87,204,000 | 83,188,000
Other Loans [Member] |  |
Total loans | 46,000 | 379,000
Total loans | $ 328,185,000 | $ 268,577,000

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