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Unconsolidated Joint Venture - Summarized Financial Information for Unconsolidated Joint Venture (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Statement of Operations: |  |  |  |
Income before income tax expense | $ 470 | $ 45 | $ 1,740 | $ 423
Comstock Holding Companies, Inc. share of net income (loss) |  |  | (114) | (9)
Title Insurance Joint Venture |  |  |  |
Statement of Operations: |  |  |  |
Comstock Holding Companies, Inc. share of net income (loss) | 1 | 48 | 16 | 115
Title Insurance Joint Venture |  |  |  |
Statement of Operations: |  |  |  |
Total net revenue | 30 | 122 | 125 | 318
Total expenses | 28 | 27 | 94 | 88
Income before income tax expense | $ 2 | $ 95 | $ 31 | $ 230

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