Discontinued Operations - Summary of Operating Results of Discontinued Operations Reflected on Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues
Total revenue		$ 1,305		$ 14,919
Expenses
Sales and marketing		89		270
General and administrative		1		21
Operating (loss)		(66)		(273)
Income tax expense		0		10
Net (loss) from discontinued operations		(66)		(283)
Net income attributable to non-controlling interests		0		313
Net (loss) attributable to Comstock Holding Companies, Inc.	$ 0	(66)	$ 0	(596)
Homebuilding
Revenues
Total revenue		1,305		14,919
Expenses
Cost of sales—homebuilding		$ 1,281		$ 14,901

Disposal group, including discontinued operation, operating cost and expense.

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Disposal group, including discontinued operation, revenue.

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Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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