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ORGANIZATION AND OPERATIONS (Details) (USD $)
0 Months Ended
Apr. 29, 2014
Dec. 31, 2014
Apr. 29, 2014
Apr. 28, 2014
Dec. 31, 2013
Organization and operations          
Common shares authorized   200,000,000us-gaap_CommonStockSharesAuthorized   1,000,000,000us-gaap_CommonStockSharesAuthorized 20,000,000us-gaap_CommonStockSharesAuthorized
Common shares authorized before amendment with effect to the reverse stock split       20,000,000cmct_CommonStockSharesAuthorizedBeforeAmendmentToIncreaseAuthorizeSharesAfterReverseStockSplitEffect  
Common shares authorized with effect to the reverse stock split 200,000,000cmct_CommonStockSharesAuthorizedWithReverseStockSplitEffect   200,000,000cmct_CommonStockSharesAuthorizedWithReverseStockSplitEffect    
Reverse stock split ratio 0.2us-gaap_StockholdersEquityNoteStockSplitConversionRatio1        
Common stock, par value (in dollars per share) $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare   $ 0.05us-gaap_CommonStockParOrStatedValuePerShare
PMC Commercial          
Organization and operations          
Common shares authorized before amendment       100,000,000cmct_CommonStockSharesAuthorizedBeforeAmendment
/ us-gaap_BusinessAcquisitionAxis
= cmct_PMCCommercialTrustMember
 
Common shares authorized       1,000,000,000us-gaap_CommonStockSharesAuthorized
/ us-gaap_BusinessAcquisitionAxis
= cmct_PMCCommercialTrustMember