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Stockholders' Equity - Additional Information (Detail) (USD $)
0 Months Ended 12 Months Ended 3 Months Ended
Feb. 28, 2014
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Jul. 17, 2013
May 12, 2014
Stockholders Equity [Line Items]            
Common stock shares sold   12,775,044us-gaap_CommonStockSharesIssued 8,810,624us-gaap_CommonStockSharesIssued      
Net proceeds from equity financing   $ 2,129,924us-gaap_ProceedsFromIssuanceOrSaleOfEquity $ 3,692,844us-gaap_ProceedsFromIssuanceOrSaleOfEquity      
Purchase of shares 5,000,000us-gaap_TreasuryStockValue          
Common stock share premium percentage 10.00%crxm_CommonStockSharePremiumPercentage          
Common stock per share   $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare   $ 0.0001us-gaap_CommonStockParOrStatedValuePerShare  
Common stock shares sold value   1,278us-gaap_CommonStockValue 881us-gaap_CommonStockValue      
Initial Tranche [Member]            
Stockholders Equity [Line Items]            
Common stock shares sold 714,286us-gaap_CommonStockSharesIssued
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
         
Common stock per share $ 0.70us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
         
Second Tranche [Member]            
Stockholders Equity [Line Items]            
Common stock shares sold           2,330,278us-gaap_CommonStockSharesIssued
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Common stock per share           $ 0.6437us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Common stock shares sold value           1,500,000us-gaap_CommonStockValue
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Third Tranche [Member]            
Stockholders Equity [Line Items]            
Common stock shares sold   466,056us-gaap_CommonStockSharesIssued
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
       
Common stock per share   $ 0.6437us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
       
Common stock shares sold value   300,000us-gaap_CommonStockValue
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
       
Third Tranche [Member]            
Stockholders Equity [Line Items]            
Common stock shares sold value   1,000,000us-gaap_CommonStockValue
/ us-gaap_VestingAxis
= crxm_TrancheThreeMember
       
Fourth Tranche [Member]            
Stockholders Equity [Line Items]            
Common stock shares sold value   1,000,000us-gaap_CommonStockValue
/ us-gaap_VestingAxis
= crxm_TrancheFourMember
       
Fifth Tranche [Member]            
Stockholders Equity [Line Items]            
Common stock shares sold value   1,000,000us-gaap_CommonStockValue
/ us-gaap_VestingAxis
= crxm_TrancheFiveMember
       
At-the-market Transaction [Member]            
Stockholders Equity [Line Items]            
Common stock shares sold       17,187us-gaap_CommonStockSharesIssued
/ us-gaap_FinancialInstrumentAxis
= crxm_AtMarketTransactionMember
   
Net proceeds from equity financing       $ 65,743us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_FinancialInstrumentAxis
= crxm_AtMarketTransactionMember