XML 82 R70.htm IDEA: XBRL DOCUMENT
v3.19.1

Note 5 - Loans and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Beginning balance |  |  |  | $ 4,774 |  |  |  | $ 4,856 | $ 4,774 | $ 4,856 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (3,117) | (2,991) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 776 | 922 |  |  |
Provision for loan and lease losses | $ 473 | $ 789 | $ 702 | 658 | $ 523 | $ 373 | $ 576 | 515 | 2,622 | 1,987 |  |  |
Ending balance | 5,055 |  |  |  | 4,774 |  |  |  | 5,055 | 4,774 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | $ 166 |  | $ 98
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 4,889 |  | 4,676
Loans, allowance for loan losses | 5,055 |  |  | 4,774 | 4,774 |  |  | 4,856 | 5,055 | 4,774 | 5,055 |  | 4,774
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1,042 |  | 791
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 524,331 |  | 356,667
Loans |  |  |  |  |  |  |  |  |  |  | 525,870 |  | 357,458
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance |  |  |  |  |  |  |  |  |  |  |  |  |
Loans, allowance for loan losses |  |  |  |  |  |  |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |  |  | 497 |  |
Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 203 |  |  |  | 535 | 203 | 535 |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 37 | (332) |  |  |
Ending balance | 240 |  |  |  | 203 |  |  |  | 240 | 203 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 28 |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 212 |  | 203
Loans, allowance for loan losses | 240 |  |  | 203 | 203 |  |  | 535 | 203 | 203 | 240 |  | 203
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 153 |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 41,114 |  | 26,143
Loans |  |  |  |  |  |  |  |  |  |  | 41,340 |  | 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 | 290 | 411 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (101) | (28) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 74 | 135 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 83 | (228) |  |  |
Ending balance | 346 |  |  |  | 290 |  |  |  | 346 | 290 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 50 |  | 5
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 296 |  | 285
Loans, allowance for loan losses | 346 |  |  | 290 | 290 |  |  | 411 | 290 | 290 | 346 |  | 290
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 268 |  | 187
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 110,064 |  | 44,886
Loans |  |  |  |  |  |  |  |  |  |  | 110,756 |  | 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 |  |  |  |  |  |  |  |  |  |  | 424 |  |
Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 116 |  |  |  | 88 | 116 | 88 |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 12 | 28 |  |  |
Ending balance | 128 |  |  |  | 116 |  |  |  | 128 | 116 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 128 |  | 116
Loans, allowance for loan losses | 128 |  |  | 116 | 116 |  |  | 88 | 116 | 116 | 128 |  | 116
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 23,009 |  | 16,579
Loans |  |  |  |  |  |  |  |  |  |  | 23,009 |  | 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 | 777 | 903 |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  | 4 | 69 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 50 | (195) |  |  |
Ending balance | 831 |  |  |  | 777 |  |  |  | 831 | 777 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1 |  | 21
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 830 |  | 756
Loans, allowance for loan losses | 831 |  |  | 777 | 777 |  |  | 903 | 777 | 777 | 831 |  | 777
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 511 |  | 532
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 155,651 |  | 104,601
Loans |  |  |  |  |  |  |  |  |  |  | 156,162 |  | 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 |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Member] | Other Real Estate Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 2 |  |  |  | 2 | 2 | 2 |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | (1) |  |  |  |
Ending balance | 1 |  |  |  | 2 |  |  |  | 1 | 2 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1 |  | 2
Loans, allowance for loan losses | 1 |  |  | 2 | 2 |  |  | 2 | 2 | 2 | 1 |  | 2
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1,308 |  | 190
Loans |  |  |  |  |  |  |  |  |  |  | 1,308 |  | 190
Real Estate [Member] | Other Real Estate Loans [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance |  |  |  |  |  |  |  |  |  |  |  |  |
Loans, allowance for loan losses |  |  |  |  |  |  |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial and Industrial Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 1,049 |  |  |  | 527 | 1,049 | 527 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (3) | (16) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 11 | 19 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 81 | 519 |  |  |
Ending balance | 1,138 |  |  |  | 1,049 |  |  |  | 1,138 | 1,049 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 67 |  | 72
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1,071 |  | 977
Loans, allowance for loan losses | 1,138 |  |  | 1,049 | 1,049 |  |  | 527 | 1,049 | 1,049 | 1,138 |  | 1,049
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 67 |  | 72
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 85,712 |  | 69,897
Loans |  |  |  |  |  |  |  |  |  |  | 85,779 | [1] | 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 | 1,715 | 1,767 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (2,482) | (2,360) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 568 | 601 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 1,998 | 1,707 |  |  |
Ending balance | 1,799 |  |  |  | 1,715 |  |  |  | 1,799 | 1,715 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 20 |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1,779 |  | 1,715
Loans, allowance for loan losses | 1,799 |  |  | 1,715 | 1,715 |  |  | 1,767 | 1,715 | 1,715 | 1,799 |  | 1,715
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 43 |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 38,540 |  | 39,300
Loans |  |  |  |  |  |  |  |  |  |  | 38,583 |  | 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] | Branch Retail [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 393 |  |  |  | 467 | 393 | 467 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (415) | (538) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 113 | 98 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 336 | 366 |  |  |
Ending balance | 427 |  |  |  | 393 |  |  |  | 427 | 393 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 427 |  | 393
Loans, allowance for loan losses | 427 |  |  | 393 | 393 |  |  | 467 | 393 | 393 | 427 |  | 393
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 28,324 |  | 26,434
Loans |  |  |  |  |  |  |  |  |  |  | 28,324 |  | 26,434
Consumer Portfolio Segment [Member] | Branch Retail [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 |  |  |  | 229 |  |  |  | 156 | 229 | 156 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (116) | (49) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 6 |  |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 26 | 122 |  |  |
Ending balance | 145 |  |  |  | 229 |  |  |  | 145 | 229 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 145 |  | 229
Loans, allowance for loan losses | 145 |  |  | 229 | 229 |  |  | 156 | 229 | 229 | 145 |  | 229
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 40,609 |  | 28,637
Loans |  |  |  |  |  |  |  |  |  |  | 40,609 |  | 28,637
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 | 2,447 | 2,409 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (16) | (79) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 89 | 247 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 215 | (130) |  |  |
Ending balance | 2,735 |  |  |  | 2,447 |  |  |  | 2,735 | 2,447 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 166 |  | 98
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 2,569 |  | 2,349
Loans, allowance for loan losses | 2,735 |  |  | 2,447 | 2,447 |  |  | 2,409 | 2,735 | 2,447 | 2,735 |  | 2,447
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 831 |  | 791
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 416,168 |  | 256,712
Loans |  |  |  |  |  |  |  |  |  |  | 417,496 |  | 257,503
FUSB [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance |  |  |  |  |  |  |  |  |  |  |  |  |
Loans, allowance for loan losses |  |  |  |  |  |  |  |  |  |  |  |  |
Loans |  |  |  |  |  |  |  |  |  |  | 497 |  |
FUSB [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 203 |  |  |  | 535 | 203 | 535 |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 37 | (332) |  |  |
Ending balance | 240 |  |  |  | 203 |  |  |  | 240 | 203 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 28 |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 212 |  | 203
Loans, allowance for loan losses | 240 |  |  | 203 | 203 |  |  | 535 | 203 | 203 | 240 |  | 203
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 153 |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 41,114 |  | 26,143
Loans |  |  |  |  |  |  |  |  |  |  | 41,340 |  | 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 | 238 | 304 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (9) |  |  |  |
Recoveries |  |  |  |  |  |  |  |  | 51 | 103 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 42 | (169) |  |  |
Ending balance | 322 |  |  |  | 238 |  |  |  | 322 | 238 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 50 |  | 5
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 272 |  | 233
Loans, allowance for loan losses | 322 |  |  | 238 | 238 |  |  | 304 | 238 | 238 | 322 |  | 238
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 57 |  | 187
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 102,490 |  | 34,085
Loans |  |  |  |  |  |  |  |  |  |  | 102,971 |  | 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 |  |  |  |  |  |  |  |  |  |  | 424 |  |
FUSB [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 116 |  |  |  | 88 | 116 | 88 |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 12 | 28 |  |  |
Ending balance | 128 |  |  |  | 116 |  |  |  | 128 | 116 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 128 |  | 116
Loans, allowance for loan losses | 128 |  |  | 116 | 116 |  |  | 88 | 116 | 116 | 128 |  | 116
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 23,009 |  | 16,579
Loans |  |  |  |  |  |  |  |  |  |  | 23,009 |  | 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 | 777 | 903 |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  | 4 | 69 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 50 | (195) |  |  |
Ending balance | 831 |  |  |  | 777 |  |  |  | 831 | 777 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1 |  | 21
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 830 |  | 756
Loans, allowance for loan losses | 831 |  |  | 777 | 777 |  |  | 903 | 777 | 777 | 831 |  | 777
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 511 |  | 532
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 155,651 |  | 104,601
Loans |  |  |  |  |  |  |  |  |  |  | 156,162 |  | 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 |  |  |  |  |  |  |  |  |  |  |  |  |
FUSB [Member] | Real Estate [Member] | Other Real Estate Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 2 |  |  |  | 2 | 2 | 2 |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | (1) |  |  |  |
Ending balance | 1 |  |  |  | 2 |  |  |  | 1 | 2 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1 |  | 2
Loans, allowance for loan losses | 1 |  |  | 2 | 2 |  |  | 2 | 2 | 2 | 1 |  | 2
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1,308 |  | 190
Loans |  |  |  |  |  |  |  |  |  |  | 1,308 |  | 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 |  |  |  |  |  |  |  |  |  |  |  |  |
FUSB [Member] | Commercial and Industrial Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 1,049 |  |  |  | 527 | 1,049 | 527 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (3) | (16) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 11 | 19 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 81 | 519 |  |  |
Ending balance | 1,138 |  |  |  | 1,049 |  |  |  | 1,138 | 1,049 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 67 |  | 72
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1,071 |  | 977
Loans, allowance for loan losses | 1,138 |  |  | 1,049 | 1,049 |  |  | 527 | 1,049 | 1,049 | 1,138 |  | 1,049
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 67 |  | 72
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 85,712 |  | 69,897
Loans |  |  |  |  |  |  |  |  |  |  | 85,779 | [1] | 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 |  |  |  |  |  |  |  |  |  |  | 6,927 |  | 5,217
FUSB [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 62 |  |  |  | 50 | 62 | 50 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (4) | (63) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 23 | 56 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | (6) | 19 |  |  |
Ending balance | 75 |  |  |  | 62 |  |  |  | 75 | 62 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 20 |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 55 |  | 62
Loans, allowance for loan losses | 75 |  |  | 62 | 62 |  |  | 50 | 62 | 62 | 75 |  | 62
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 43 |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 6,884 |  | 5,217
Loans |  |  |  |  |  |  |  |  |  |  | 6,927 |  | 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] | Branch Retail [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  |  |  |  |  |  |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease 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] | Branch Retail [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 and lease 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 | 2,327 | 2,447 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (3,101) | (2,912) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 687 | 675 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 2,407 | 2,117 |  |  |
Ending balance | 2,320 |  |  |  | 2,327 |  |  |  | 2,320 | 2,327 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 2,320 |  | 2,327
Loans, allowance for loan losses | 2,320 |  |  | 2,327 | 2,327 |  |  | 2,447 | 2,320 | 2,327 | 2,320 |  | 2,327
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 211 |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 108,163 |  | 99,955
Loans |  |  |  |  |  |  |  |  |  |  | 108,374 |  | 99,955
ALC [Member] | Real Estate [Member] | Construction, Land Development and Other Land Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  |  |  |  |  |  |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease 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 | 52 | 107 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (92) | (28) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 23 | 32 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 41 | (59) |  |  |
Ending balance | 24 |  |  |  | 52 |  |  |  | 24 | 52 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 24 |  | 52
Loans, allowance for loan losses | 24 |  |  | 52 | 52 |  |  | 107 | 52 | 52 | 24 |  | 52
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 211 |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 7,574 |  | 10,801
Loans |  |  |  |  |  |  |  |  |  |  | 7,785 |  | 10,801
ALC [Member] | Real Estate [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  |  |  |  |  |  |  |  |  |  |
Charge-offs |  |  |  |  |  |  |  |  |  |  |  |  |
Recoveries |  |  |  |  |  |  |  |  |  |  |  |  |
Provision for loan and lease 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 and lease 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 and lease 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 and lease 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 |  |  |  |  |  |  |  |  |  |  |  | [1] |
ALC [Member] | Consumer Portfolio Segment [Member] | Consumer Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 1,653 |  |  |  | 1,717 | 1,653 | 1,717 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (2,478) | (2,297) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 545 | 545 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 2,004 | 1,688 |  |  |
Ending balance | 1,724 |  |  |  | 1,653 |  |  |  | 1,724 | 1,653 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 1,724 |  | 1,653
Loans, allowance for loan losses | 1,724 |  |  | 1,653 | 1,653 |  |  | 1,717 | 1,653 | 1,653 | 1,724 |  | 1,653
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 31,656 |  | 34,083
Loans |  |  |  |  |  |  |  |  |  |  | 31,656 |  | 34,083
ALC [Member] | Consumer Portfolio Segment [Member] | Branch Retail [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 393 |  |  |  | 467 | 393 | 467 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (415) | (538) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 113 | 98 |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 336 | 366 |  |  |
Ending balance | 427 |  |  |  | 393 |  |  |  | 427 | 393 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 427 |  | 393
Loans, allowance for loan losses | 427 |  |  | 393 | 393 |  |  | 467 | 393 | 393 | 427 |  | 393
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 28,324 |  | 26,434
Loans |  |  |  |  |  |  |  |  |  |  | 28,324 |  | 26,434
ALC [Member] | Consumer Portfolio Segment [Member] | Indirect Sales [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 229 |  |  |  | 156 | 229 | 156 |  |  |
Charge-offs |  |  |  |  |  |  |  |  | (116) | (49) |  |  |
Recoveries |  |  |  |  |  |  |  |  | 6 |  |  |  |
Provision for loan and lease losses |  |  |  |  |  |  |  |  | 26 | 122 |  |  |
Ending balance | 145 |  |  |  | 229 |  |  |  | 145 | 229 |  |  |
Allowance for loan losses individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 145 |  | 229
Loans, allowance for loan losses | $ 145 |  |  | $ 229 | $ 229 |  |  | $ 156 | $ 229 | $ 229 | 145 |  | 229
Loans individually evaluated for impairment |  |  |  |  |  |  |  |  |  |  |  |  |
Loans collectively evaluated for impairment |  |  |  |  |  |  |  |  |  |  | 40,609 |  | 28,637
Loans |  |  |  |  |  |  |  |  |  |  | $ 40,609 |  | $ 28,637
[1] | Includes equipment financing leases.

X
- Definition Represents the amount of provision (reduction in reserve) for loan losses during the period. + References No definition available. + Details
Name: | fusb_ProvisionReductionInReserveForLoanLosses
Namespace Prefix: | fusb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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
Name: | us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: 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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fusb_RealEstate1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fusb_ConstructionLandDevelopmentAndOtherLandLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fusb_SecuredBy1To4FamilyResidentialPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fusb_SecuredByMultifamilyResidentialPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fusb_SecuredByNonfarmNonresidentialPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fusb_OtherRealEstateLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=fusb_CommercialAndIndustrialLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fusb_ConsumerLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fusb_BranchRetailMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fusb_IndirectSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=fusb_FirstUnitedSecurityBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=fusb_AcceptanceLoanCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |