XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.20.2

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Redeemable Preferred Stock (Details) | 1 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 29, 2020 | Sep. 30, 2020
Accounting Policies [Abstract] |  |
Preferred stock, percentage of stated value |  | 100.00%
Preferred stock redemption, trading days prior to redemption | 20 days | 20 days

X
- Definition Preferred Stock, Redemption Price, Consecutive Trading Days of Weighted Average Common Stock Price + References No definition available. + Details
Name: | cmct_PreferredStockRedemptionPriceConsecutiveTradingDaysofWeightedAverageCommonStockPrice
Namespace Prefix: | cmct_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Stock, Redemption Price, Percentage + References No definition available. + Details
Name: | cmct_PreferredStockRedemptionPricePercentage
Namespace Prefix: | cmct_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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