XML 42 R32.htm IDEA: XBRL DOCUMENT v3.21.1

Investments in Unconsolidated Entities - Schedule of Investments in Real Estate Ventures (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Equity Method Investment and Joint Venture, Fair Value Change [Roll Forward]
Fair value investments, starting balance	$ 6,307
Change in fair value	(18)	$ 47
Fair value investments, ending balance	$ 4,665

X

- Definition

Change in fair value of equity method investment.

+ References

No definition available.

+ Details

Name:	chci_ChangeInFairValueOfEquityMethodInvestment
Namespace Prefix:	chci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Equity Method Investment, Fair Value Change

+ References

No definition available.

+ Details

Name:	chci_EquityMethodInvestmentFairValueChangeRollForward
Namespace Prefix:	chci_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of investments accounted under the equity method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117311354&loc=d3e32014-111567

+ Details

Name:	us-gaap_EquityMethodInvestmentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant