XML 104 R90.htm IDEA: XBRL DOCUMENT
v3.22.0.1

INCOME TAXES - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Operating Loss Carryforwards [Line Items] |  |
Reserve for uncertain tax positions | $ 0 | $ 0
TRS |  |
Operating Loss Carryforwards [Line Items] |  |
Decrease in valuation allowance | $ 273,000 |

X
- Definition The amount of reserve recognized for uncertain tax positions. + References No definition available. + Details
Name: | cmct_ReserveForUncertainTaxPositions
Namespace Prefix: | cmct_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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_OperatingLossCarryforwardsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
Name: | us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=cmct_ReitSubsidiariesTaxableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |