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Business Segments - Summary of Segment Reporting Information by Segment (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Segment Reporting Information [Line Items] |  |  |  |  |
Interest income | $ 14,444,000 | $ 8,118,000 | $ 38,034,000 | $ 22,430,000 |
Revenues | 785,000 | 519,000 | 2,353,000 | 1,610,000 |
Revenues | 17,749,000 | 4,973,000 | 39,270,000 | 14,255,000 |
Revenues | 16,964,000 | 4,454,000 | 36,917,000 | 12,645,000 |
Revenues | 32,193,000 | 13,091,000 | 77,304,000 | 36,685,000 |
Interest expense | 2,615,000 | 2,682,000 | 7,537,000 | 6,943,000 |
Provision for loan losses | 4,000,000 | 570,000 | 8,075,000 | 1,465,000 | $ 1,742,000
Salary and benefits | 11,880,000 | 5,079,000 | 30,141,000 | 14,149,000 |
Other operating expenses | 6,932,000 | 3,128,000 | 15,817,000 | 9,068,000 |
Total expense | 25,427,000 | 11,459,000 | 61,570,000 | 31,625,000 |
Income (loss) before income taxes | 6,766,000 | 1,632,000 | 15,734,000 | 5,060,000 |
Income tax expense (benefit) | 1,707,000 | 379,000 | 3,618,000 | 989,000 |
Net income (loss) | 5,059,000 | 1,253,000 | 12,116,000 | 4,071,000 |
Net (income) loss attributable to noncontrolling interest | 4,000 | (3,000) | (1,000) | (21,000) |
Net income available to common shareholders | 5,063,000 | 1,250,000 | 12,115,000 | 4,050,000 |
Mortgage Banking Income, Net [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 16,044,000 | 3,943,000 | 35,210,000 | 10,966,000 |
Other operating income (expense) [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 1,269,000 | 627,000 | 2,655,000 | 2,087,000 |
Blue Ridge Bank [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Interest income | 13,495,000 | 7,757,000 | 35,985,000 | 21,581,000 |
Revenues | 14,985,000 | 8,538,000 | 39,327,000 | 24,097,000 |
Interest expense | 2,132,000 | 2,289,000 | 6,440,000 | 5,921,000 |
Provision for loan losses | 4,000,000 | 570,000 | 8,075,000 | 1,465,000 |
Salary and benefits | 3,311,000 | 2,126,000 | 9,586,000 | 6,167,000 |
Other operating expenses | 3,370,000 | 1,785,000 | 8,771,000 | 5,194,000 |
Total expense | 12,813,000 | 6,770,000 | 32,872,000 | 18,747,000 |
Income (loss) before income taxes | 2,172,000 | 1,768,000 | 6,455,000 | 5,350,000 |
Income tax expense (benefit) | 528,000 | 344,000 | 1,443,000 | 932,000 |
Net income (loss) | 1,644,000 | 1,424,000 | 5,012,000 | 4,418,000 |
Net income available to common shareholders | 1,644,000 | 1,424,000 | 5,012,000 | 4,418,000 |
Blue Ridge Bank [Member] | Other operating income (expense) [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 1,275,000 | 610,000 | 2,673,000 | 2,057,000 |
Blue Ridge Bank Mortgage Division [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Interest income | 917,000 | 359,000 | 2,012,000 | 845,000 |
Revenues | 16,961,000 | 4,302,000 | 37,222,000 | 11,811,000 |
Interest expense | 72,000 | 215,000 | 243,000 | 490,000 |
Salary and benefits | 8,455,000 | 2,858,000 | 20,221,000 | 7,711,000 |
Other operating expenses | 2,133,000 | 955,000 | 4,914,000 | 2,697,000 |
Total expense | 10,660,000 | 4,028,000 | 25,378,000 | 10,898,000 |
Income (loss) before income taxes | 6,301,000 | 274,000 | 11,844,000 | 913,000 |
Income tax expense (benefit) | 1,276,000 | 80,000 | 2,440,000 | 193,000 |
Net income (loss) | 5,025,000 | 194,000 | 9,404,000 | 720,000 |
Net income available to common shareholders | 5,025,000 | 194,000 | 9,404,000 | 720,000 |
Blue Ridge Bank Mortgage Division [Member] | Mortgage Banking Income, Net [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 16,044,000 | 3,943,000 | 35,210,000 | 10,966,000 |
MoneyWise Payroll [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 221,000 | 232,000 | 736,000 | 743,000 |
Salary and benefits | 114,000 | 95,000 | 334,000 | 271,000 |
Other operating expenses | 133,000 | 119,000 | 393,000 | 344,000 |
Total expense | 247,000 | 214,000 | 727,000 | 615,000 |
Income (loss) before income taxes | (26,000) | 18,000 | 9,000 | 128,000 |
Income tax expense (benefit) | (5,000) | (1,000) | 2,000 | 22,000 |
Net income (loss) | (21,000) | 19,000 | 7,000 | 106,000 |
Net (income) loss attributable to noncontrolling interest | 4,000 | (3,000) | (1,000) | (21,000) |
Net income available to common shareholders | (17,000) | 16,000 | 6,000 | 85,000 |
Parents Only [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Interest income | 32,000 | 2,000 | 37,000 | 4,000 |
Revenues | 32,000 | 25,000 | 37,000 | 52,000 |
Interest expense | 411,000 | 178,000 | 854,000 | 532,000 |
Other operating expenses | 1,302,000 | 275,000 | 1,757,000 | 851,000 |
Total expense | 1,713,000 | 453,000 | 2,611,000 | 1,383,000 |
Income (loss) before income taxes | (1,681,000) | (428,000) | (2,574,000) | (1,331,000) |
Income tax expense (benefit) | (92,000) | (44,000) | (267,000) | (158,000) |
Net income (loss) | (1,589,000) | (384,000) | (2,307,000) | (1,173,000) |
Net income available to common shareholders | (1,589,000) | (384,000) | (2,307,000) | (1,173,000) |
Parents Only [Member] | Other operating income (expense) [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues |  | 23,000 |  | 48,000 |
Eliminations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | (6,000) | (6,000) | (18,000) | (18,000) |
Other operating expenses | (6,000) | (6,000) | (18,000) | (18,000) |
Total expense | (6,000) | (6,000) | (18,000) | (18,000) |
Eliminations [Member] | Other operating income (expense) [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | (6,000) | (6,000) | (18,000) | (18,000) |
Service Charge on Deposit Accounts [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 215,000 | 171,000 | 669,000 | 459,000 |
Service Charge on Deposit Accounts [Member] | Blue Ridge Bank [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 215,000 | 171,000 | 669,000 | 459,000 |
Payroll Processing Revenue |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 221,000 | 232,000 | 736,000 | 743,000 |
Payroll Processing Revenue | MoneyWise Payroll [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | $ 221,000 | $ 232,000 | $ 736,000 | $ 743,000 |

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