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Unconsolidated Joint Venture - Summarized Financial Information for Unconsolidated Joint Venture (Detail) - Title Insurance Joint Venture [Member] - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Statement of Operations: |  |
Total net revenue | $ 147 | $ 58
Total expenses | 33 | 30
Net income | 114 | 28
Comstock Holding Companies, Inc. share of net income | $ 57 | $ 14

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