Discontinued Operations - Summary of Operating Results of Discontinued Operations Reflected on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Total revenue	$ 1,305	$ 11,498	$ 14,919	$ 27,905
Expenses
Impairment charges	0	1,354	0	2,128
Sales and marketing	89	280	270	703
General and administrative	1	0	21	0
Interest and real estate tax expense	0	13	0	74
Operating (loss)	(66)	(1,876)	(273)	(3,796)
Other (loss), net	0	(5)	0	0
(Loss) from discontinued operations before income taxes	(66)	(1,881)	(273)	(3,796)
Income tax expense	0	6	10	23
Net (loss) from discontinued operations	(66)	(1,887)	(283)	(3,819)
Net income attributable to non-controlling interests	0	314	313	594
Net (loss) attributable to Comstock Holding Companies, Inc.	(66)	(2,201)	(596)	(4,413)
Homebuilding [Member]
Revenues
Total revenue	1,305	11,497	14,919	27,767
Expenses
Cost of sales	1,281	11,727	14,901	28,796
Real Estate Services [Member]
Revenues
Total revenue	$ 0	$ 1	$ 0	$ 138

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