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ORGANIZATION AND OPERATIONS (Details) (USD $)
0 Months Ended
Apr. 29, 2014
Mar. 31, 2015
Dec. 31, 2014
Apr. 29, 2014
Apr. 28, 2014
Organization and operations          
Common shares authorized   200,000,000us-gaap_CommonStockSharesAuthorized 200,000,000us-gaap_CommonStockSharesAuthorized   1,000,000,000us-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 $ 0.001us-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