Class of warrant or right number of warrants issued during period.

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- Definition

Class Of Warrant Or Right Value Of Warrants Issued During Period

+ References

No definition available.

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- Definition

Number of town houses.

+ References

No definition available.

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- Definition

Number Of Warrants Issued

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No definition available.

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- Definition

Percentage over members capital account for purchase price.

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No definition available.

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- Definition

Sale of stock consideration received on transaction in private placement.

+ References

No definition available.

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- Definition

Subscription from membership interest maximum capital amount in private placement.

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No definition available.

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- Definition

Subscription From Membership Interest Maximum Capital Amount In Private Placement Additional

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No definition available.

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- Definition

Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Amount of expense (income) related to adjustment to fair value of warrant liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section 25
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6939902&loc=d3e20148-110875

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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- Definition

Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

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- Definition

The percentage rate used to calculate dividend payments on preferred stock.

+ References

No definition available.

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- Definition

The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5710-111685

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- Definition

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Consolidation of Variable Interest Entities - Additional Information (Detail)	1 Months Ended					3 Months Ended
	Oct. 31, 2017 USD ($) shares	Jan. 31, 2017 USD ($)	Aug. 31, 2016 USD ($) shares	Jun. 30, 2015 USD ($)	Dec. 31, 2013 USD ($) Townhomes shares	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Oct. 31, 2016 USD ($)
Variable Interest Entity [Line Items]
Distribution to non-controlling interests						$ 0	$ 1,908,000
Total liabilities of VIEs						14,900,000		$ 15,900,000
Total assets of VIEs						28,000,000		$ 30,600,000
Comstock Investors VIII, L.C [Member]
Variable Interest Entity [Line Items]
Cumulative, compounded, preferred return rate					20.00%
Percentage of cumulative cash on cash return					20.00%
Comstock Investors VIII, L.C [Member] \| Virginia [Member]
Variable Interest Entity [Line Items]
Number of townhomes \| Townhomes					42
Comstock Investors VIII, L.C [Member] \| Maryland [Member]
Variable Interest Entity [Line Items]
Number of townhomes \| Townhomes					45
Comstock Investors VIII, L.C [Member] \| Class B [Member]
Variable Interest Entity [Line Items]
Distribution to non-controlling interests		$ 1,900,000
Comstock Investors VIII, L.C [Member] \| Class A [Member]
Variable Interest Entity [Line Items]
Number of warrants issued \| shares					14,573
Aggregate fair value of warrants for investors					$ 131,000
Comstock Investors VIII, L.C [Member] \| Subsidiaries [Member] \| Private Placement [Member] \| Class B [Member]
Variable Interest Entity [Line Items]
Initial aggregate principal amount up to capital raise					$ 4,000,000
Comstock Investors IX, L.C. [Member]
Variable Interest Entity [Line Items]
Cumulative, compounded, preferred return rate				20.00%
Percentage of cumulative cash on cash return				20.00%
Preferred distribution						0	0
Comstock Investors IX, L.C. [Member] \| Subsidiaries [Member] \| Private Placement [Member] \| Class B [Member]
Variable Interest Entity [Line Items]
Initial aggregate principal amount up to capital raise				$ 2,500,000
Comstock Investors X, L.C. [Member]
Variable Interest Entity [Line Items]
Cumulative, compounded, preferred return rate			6.00%
Distribution to non-controlling interests						$ 0	$ 0
Aggregate capital raise	$ 19,500,000
Additional capital raised	$ 5,000,000
Warrants issued \| shares	50,000
Aggregate fair value	$ 81,000
Comstock Investors X, L.C. [Member] \| Class A [Member]
Variable Interest Entity [Line Items]
Number of warrants issued \| shares			150,000
Aggregate fair value of warrants for investors			$ 258,000
Comstock Investors X, L.C. [Member] \| Private Placement [Member]
Variable Interest Entity [Line Items]
Aggregate capital raise									$ 14,500,000
Comstock Investors X, L.C. [Member] \| Subsidiaries [Member] \| Private Placement [Member] \| Class B [Member]
Variable Interest Entity [Line Items]
Initial aggregate principal amount up to capital raise			$ 5,000,000
Comstock Development Services LC [Member] \| Private Placement [Member]
Variable Interest Entity [Line Items]
Aggregate capital raise									$ 9,500,000