Agreement additional extension term.

No definition available.

Name:	chci_AgreementAdditionalExtensionTerm
Namespace Prefix:	chci_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Agreement Cost-Plus And Market Rate Fee, Multiply, Termination Fee Payment

+ References

No definition available.

+ Details

Name:	chci_AgreementCostPlusAndMarketRateFeeMultiplyTerminationFeePayment
Namespace Prefix:	chci_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

Name:	chci_AgreementNoticePeriodAfterEffectiveDateForTermination
Namespace Prefix:	chci_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Agreement notice period required for non renewal.

+ References

No definition available.

+ Details

Name:	chci_AgreementNoticePeriodRequiredForNonRenewal
Namespace Prefix:	chci_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Business Management Agreements Renewal Term

+ References

No definition available.

+ Details

Name:	chci_BusinessManagementAgreementsRenewalTerm
Namespace Prefix:	chci_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Entitlement Success Fee, Earned, Economic Value Percentage

+ References

No definition available.

+ Details

Name:	chci_EntitlementSuccessFeeEarnedEconomicValuePercentage
Namespace Prefix:	chci_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Future Lease Payment Percentage Of Leasing Fee

+ References

No definition available.

+ Details

Name:	chci_FutureLeasePaymentPercentageOfLeasingFee
Namespace Prefix:	chci_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Incentive Fee, Leased Rate

+ References

No definition available.

+ Details

Name:	chci_IncentiveFeeLeasedRate
Namespace Prefix:	chci_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of installments of fee payment.

+ References

No definition available.

+ Details

Name:	chci_NumberOfInstallmentsOfFeePayment
Namespace Prefix:	chci_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Operating Assets, Related To Triggering Events

+ References

No definition available.

+ Details

Name:	chci_NumberOfOperatingAssetsRelatedToTriggeringEvents
Namespace Prefix:	chci_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Square Foot

+ References

No definition available.

+ Details

Name:	chci_NumberOfSquareFoot
Namespace Prefix:	chci_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Operating Lease, Termination Fee, Percent

+ References

No definition available.

+ Details

Name:	chci_OperatingLeaseTerminationFeePercent
Namespace Prefix:	chci_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of membership interest owned by company and partners.

+ References

No definition available.

+ Details

Name:	chci_PercentageOfMembershipInterestOwnedByCompanyAndPartners
Namespace Prefix:	chci_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Property management agreements initial term.

+ References

No definition available.

+ Details

Name:	chci_PropertyManagementAgreementsInitialTerm
Namespace Prefix:	chci_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Property management agreements renewal term.

+ References

No definition available.

+ Details

Name:	chci_PropertyManagementAgreementsRenewalTerm
Namespace Prefix:	chci_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Related party transaction aggregate fee payable.

+ References

No definition available.

+ Details

Name:	chci_RelatedPartyTransactionAggregateFeePayable
Namespace Prefix:	chci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Related party transaction fee payable in installments.

+ References

No definition available.

+ Details

Name:	chci_RelatedPartyTransactionFeePayableInInstallments
Namespace Prefix:	chci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479405/805-10-25-23

+ Details

Name:	us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

+ Details

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of fee payable for management of fund or trust.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-04(12)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479170/946-210-S99-1

+ Details

Name:	us-gaap_ManagementFeePayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

+ Details

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=chci_Comstock41Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=chci_BusinessManagementAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_RelatedPartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=chci_DWCOperatingAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=chci_ResidentialPropertyManagementAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=chci_LeaseProcurementAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=chci_LeaseExpansionAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=chci_TwoThousandTwentyTwoAmendedAndRestatedAssetManagementAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Related Party Transactions - Narrative (Detail) $ in Millions				1 Months Ended		9 Months Ended
	Feb. 01, 2024	Jul. 01, 2019 USD ($)	Apr. 30, 2019 USD ($) installment	Nov. 30, 2022 ft²	Jun. 30, 2022 USD ($)	Sep. 30, 2024 USD ($)	Sep. 11, 2024 asset	Dec. 31, 2023	Sep. 30, 2023 asset	Jan. 31, 2022	Nov. 30, 2020	Feb. 07, 2020
Related Party Transaction [Line Items]
Number of operating assets, trigger event \| asset							7		3
Incentive fee, leased rate							0.85
Termination fee							0.0350
Comstock 41
Related Party Transaction [Line Items]
Business combination, acquisition related costs						$ 0.1
Entitlement success fee, earned, economic value percentage								0.25
Business Management Agreement
Related Party Transaction [Line Items]
Business management agreements renewal term	1 year	1 year
Management fee payable		$ 0.4
Related party
Related Party Transaction [Line Items]
Operating lease, term of contract										5 years	10 years
Related party \| DWC Operating Agreement
Related Party Transaction [Line Items]
Percentage of membership interest owned by company and partners												100.00%
Related party \| Residential Property Management Agreements
Related Party Transaction [Line Items]
Property management agreements initial term						1 year
Property management agreements renewal term						1 year
Related party \| Lease Procurement Agreement \| Minimum
Related Party Transaction [Line Items]
Future lease payment percentage of leasing fee						1.00%
Related party \| Lease Procurement Agreement \| Maximum
Related Party Transaction [Line Items]
Future lease payment percentage of leasing fee						2.00%
Related party \| Lease Expansion Agreement
Related Party Transaction [Line Items]
Number of square foot \| ft²				3,778
Related party \| 2022 Amended Asset Management Agreement
Related Party Transaction [Line Items]
Fixed annual payment					$ 1.0
Agreement additional extension term (in years)					1 year
Agreement notice period required for non-renewal					180 days
Agreement notice period after effective date for termination					24 months
Agreement cost-plus and market rate fee, multiply, termination fee payment					2
Related party \| Business Management Agreement
Related Party Transaction [Line Items]
Aggregate fee payable			$ 0.9
Number of installments of fee payment \| installment			15
Fee payable in installments			$ 0.1