| 13. | Income Taxes |
| | | 2017 | | 2016 | | ||
| Current | | | | | | | |
| Federal | | $ | 1,532,959 | | $ | 1,353,410 | |
| State | | | 406,410 | | | 364,394 | |
| | | | 1,939,369 | | | 1,717,804 | |
| Revaluation of deferred tax asset due to change in corporate tax rate | | | 410,391 | | | - | |
| Deferred | | | (347,446) | | | 309,016 | |
| | | $ | 2,002,314 | | $ | 2,026,820 | |
| | | 2017 | | 2016 | | ||
| Depreciation | | $ | (62,449) | | $ | (46,226) | |
| Provision for loan losses | | | (132,991) | | | 96,206 | |
| Other real estate owned allowance for loss | | | (58,576) | | | (23,075) | |
| Nonaccrual interest | | | (3,633) | | | (15,000) | |
| Prepaid captive insurance premium | | | 13,781 | | | 393,735 | |
| Write-down of equity securities | | | (592) | | | - | |
| Post-retirement benefits | | | (102,986) | | | (96,624) | |
| | | $ | (347,446) | | $ | 309,016 | |
| Deferred tax assets | | | | | | | |
| Allowance for loan losses | | $ | 627,127 | | $ | 765,966 | |
| Other real estate owned allowance for loss | | | 213,123 | | | 246,925 | |
| Write-down of equity securities | | | 4,265 | | | 5,522 | |
| Nonaccrual interest | | | 22,804 | | | 29,055 | |
| Post-retirement benefits | | | 434,891 | | | 520,410 | |
| Unrealized loss on securities available for sale | | | 149,671 | | | 182,588 | |
| | | | 1,451,881 | | | 1,750,466 | |
| Deferred tax liabilities | | | | | | | |
| Prepaid captive insurance premium | | | 282,990 | | | 391,872 | |
| Depreciation | | | 170,859 | | | 329,575 | |
| | | | 453,849 | | | 721,447 | |
| Net deferred tax asset | | $ | 998,032 | | $ | 1,029,019 | |
| Statutory federal income tax rate | | 34.0 | % | 34.0 | % |
| Increase (decrease) resulting from: | | | | | |
| Federal tax-exempt income | | (10.8) | | (4.9) | |
| State income taxes, net of federal income tax benefit | | 3.9 | | 4.9 | |
| Nondeductible expenses | | 0.1 | | 0.1 | |
| Revaluation of deferred tax asset due to change in corporate tax rate | | 7.1 | | - | |
| Other | | 0.3 | | - | |
| | | 34.6 | % | 34.1 | % |