XML 59 R49.htm IDEA: XBRL DOCUMENT
v3.20.2

Leases - Additional Information (Detail) | Sep. 30, 2020 USD ($)
--- | ---
Leases [Abstract] |
Operating lease borrowing rate (in percentage) | 6.50%
Operating lease not yet commenced, liability | $ 0

X
- Definition Lessee operating lease not yet commenced liability incurred. + References No definition available. + Details
Name: | chci_LesseeOperatingLeaseNotYetCommencedLiabilityIncurred
Namespace Prefix: | chci_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Discount rate used by lessee to determine present value of operating lease payments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant