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v3.19.1

Contract Liabilities - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Mar. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Contract liabilities, customer deposits received | $ 1,189 | $ 2,357
Revenue recognized from customer deposit | 414 |
Homebuilding [Member] |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |
Contract liabilities, customer deposits received | $ 1,189 | $ 2,357

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- Definition Contract with customer, customer deposits. + References No definition available. + Details
Name: | chci_ContractWithCustomerCustomerDeposits
Namespace Prefix: | chci_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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. + Details
Name: | us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_HomeBuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |