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Goodwill and Intangibles - Schedule of Goodwill (Detail) - USD ($) | Dec. 31, 2019 | Dec. 15, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Goodwill [Line Items] |  |  |
Goodwill | $ 19,914,942 | $ 16,608,278 | $ 2,694,164
Charlottesville Branch [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 366,300 |  | 366,300
River Bancorp, Inc. [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 1,727,864 |  | 1,727,864
Mortgage Business [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 600,000 |  | $ 600,000
Hammond Insurance [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 612,500 |  |
Virginia Community Bankshares, Inc [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | $ 16,608,278 |  |

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