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Segment Reporting - Results for Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |
Total interest income | $ 9,987 | $ 10,030 | $ 10,059 | $ 9,845 | $ 10,204 | $ 9,996 | $ 9,780 | $ 10,397 | $ 39,921 | $ 40,377
Total interest expense | 727 | 695 | 747 | 781 | 912 | 1,031 | 1,157 | 1,511 | 2,950 | 4,611
Net interest income | 9,260 | 9,335 | 9,312 | 9,064 | 9,292 | 8,965 | 8,623 | 8,886 | 36,971 | 35,766
Provision |  |  |  |  |  |  |  |  | 2,010 | 2,945
Net interest income after provision for loan and lease losses | 8,767 | 8,717 | 8,814 | 8,663 | 8,823 | 7,919 | 7,773 | 8,306 | 34,961 | 32,821
Total non-interest income | 865 | 896 | 809 | 951 | 1,008 | 1,375 | 1,330 | 1,297 | 3,521 | 5,010
Total non-interest expense | 7,414 | 8,547 | 8,399 | 8,396 | 8,477 | 8,747 | 8,581 | 8,494 | 32,756 | 34,299
Income before income taxes |  |  |  |  |  |  |  |  | 5,726 | 3,532
Provision for income taxes | 507 | 229 | 271 | 268 | 309 | 136 | 118 | 262 | 1,275 | 825
Net income (loss) | 1,711 | $ 837 | $ 953 | $ 950 | 1,045 | $ 411 | $ 404 | $ 847 | 4,451 | 2,707
Total assets | 958,302 |  |  |  | 890,511 |  |  |  | 958,302 | 890,511
Total investment securities | 134,319 |  |  |  | 91,422 |  |  |  | 134,319 | 91,422
Total loans, net | 700,030 |  |  |  | 638,374 |  |  |  | 700,030 | 638,374
Goodwill and core deposit intangible, net | 8,069 |  |  |  | 8,410 |  |  |  | 8,069 | 8,410
Fixed asset additions |  |  |  |  |  |  |  |  | 822 | 955
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 1,692 | 1,684
Total interest income from external customers |  |  |  |  |  |  |  |  | 39,921 | 40,377
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |
Total interest income |  |  |  |  |  |  |  |  | (1,642) | (2,876)
Total interest expense |  |  |  |  |  |  |  |  | (1,642) | (2,876)
Total non-interest income |  |  |  |  |  |  |  |  | (5,958) | (4,334)
Total non-interest expense |  |  |  |  |  |  |  |  | (452) | (582)
Income before income taxes |  |  |  |  |  |  |  |  | (5,506) | (3,752)
Net income (loss) |  |  |  |  |  |  |  |  | (5,506) | (3,752)
Total assets | (150,441) |  |  |  | (150,512) |  |  |  | (150,441) | (150,512)
Total loans, net | (39,069) |  |  |  | (47,700) |  |  |  | (39,069) | (47,700)
Investment in subsidiaries | (95,172) |  |  |  | (86,102) |  |  |  | (95,172) | (86,102)
Total interest income from affiliates |  |  |  |  |  |  |  |  | (1,642) | (2,876)
FUSB [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |
Total loans, net | 660,533 |  |  |  | 585,296 |  |  |  | 660,533 | 585,296
FUSB [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |
Total interest income |  |  |  |  |  |  |  |  | 32,537 | 31,834
Total interest expense |  |  |  |  |  |  |  |  | 2,842 | 4,632
Net interest income |  |  |  |  |  |  |  |  | 29,695 | 27,202
Provision |  |  |  |  |  |  |  |  | 1,515 | 2,206
Net interest income after provision for loan and lease losses |  |  |  |  |  |  |  |  | 28,180 | 24,996
Total non-interest income |  |  |  |  |  |  |  |  | 3,206 | 4,531
Total non-interest expense |  |  |  |  |  |  |  |  | 25,188 | 25,180
Income before income taxes |  |  |  |  |  |  |  |  | 6,198 | 4,347
Provision for income taxes |  |  |  |  |  |  |  |  | 1,305 | 930
Net income (loss) |  |  |  |  |  |  |  |  | 4,893 | 3,417
Total assets | 961,572 |  |  |  | 893,430 |  |  |  | 961,572 | 893,430
Total investment securities | 134,238 |  |  |  | 91,342 |  |  |  | 134,238 | 91,342
Total loans, net | 699,600 |  |  |  | 632,996 |  |  |  | 699,600 | 632,996
Goodwill and core deposit intangible, net | 8,069 |  |  |  | 8,410 |  |  |  | 8,069 | 8,410
Fixed asset additions |  |  |  |  |  |  |  |  | 816 | 870
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 1,613 | 1,563
Total interest income from external customers |  |  |  |  |  |  |  |  | 30,902 | 28,979
Total interest income from affiliates |  |  |  |  |  |  |  |  | 1,635 | 2,855
ALC [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |
Total loans, net | 39,497 |  |  |  | 53,078 |  |  |  | 39,497 | 53,078
ALC [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |
Total interest income |  |  |  |  |  |  |  |  | 9,019 | 11,397
Total interest expense |  |  |  |  |  |  |  |  | 1,635 | 2,855
Net interest income |  |  |  |  |  |  |  |  | 7,384 | 8,542
Provision |  |  |  |  |  |  |  |  | 495 | 739
Net interest income after provision for loan and lease losses |  |  |  |  |  |  |  |  | 6,889 | 7,803
Total non-interest income |  |  |  |  |  |  |  |  | 576 | 752
Total non-interest expense |  |  |  |  |  |  |  |  | 6,599 | 8,136
Income before income taxes |  |  |  |  |  |  |  |  | 866 | 419
Provision for income taxes |  |  |  |  |  |  |  |  | 221 | 125
Net income (loss) |  |  |  |  |  |  |  |  | 645 | 294
Total assets | 40,924 |  |  |  | 55,727 |  |  |  | 40,924 | 55,727
Total loans, net | 39,499 |  |  |  | 53,078 |  |  |  | 39,499 | 53,078
Fixed asset additions |  |  |  |  |  |  |  |  | 6 | 85
Depreciation and amortization expense |  |  |  |  |  |  |  |  | 79 | 121
Total interest income from external customers |  |  |  |  |  |  |  |  | 9,019 | 11,397
Other Segments [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |  |  |  |  |  |  |  |  |
Total interest income |  |  |  |  |  |  |  |  | 7 | 22
Total interest expense |  |  |  |  |  |  |  |  | 115 |
Net interest income |  |  |  |  |  |  |  |  | (108) | 22
Net interest income after provision for loan and lease losses |  |  |  |  |  |  |  |  | (108) | 22
Total non-interest income |  |  |  |  |  |  |  |  | 5,697 | 4,061
Total non-interest expense |  |  |  |  |  |  |  |  | 1,421 | 1,565
Income before income taxes |  |  |  |  |  |  |  |  | 4,168 | 2,518
Provision for income taxes |  |  |  |  |  |  |  |  | (251) | (230)
Net income (loss) |  |  |  |  |  |  |  |  | 4,419 | 2,748
Total assets | 106,247 |  |  |  | 91,866 |  |  |  | 106,247 | 91,866
Total investment securities | 81 |  |  |  | 80 |  |  |  | 81 | 80
Investment in subsidiaries | $ 95,172 |  |  |  | $ 86,102 |  |  |  | 95,172 | 86,102
Total interest income from external customers |  |  |  |  |  |  |  |  |  | 1
Total interest income from affiliates |  |  |  |  |  |  |  |  | $ 7 | $ 21

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