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Organization and Operations (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Subsidiary
Dec. 31, 2013
Dec. 31, 2012
Organization and Operations [Abstract]                      
Equity method ownership interest in joint venture (in hundredths) 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage               50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage    
Number of subsidiaries                 5cytx_NumberOfSubsidiaries    
Net loss $ 5,755,000us-gaap_NetIncomeLoss $ 9,385,000us-gaap_NetIncomeLoss $ 11,828,000us-gaap_NetIncomeLoss $ 10,400,000us-gaap_NetIncomeLoss $ 10,041,000us-gaap_NetIncomeLoss $ 5,258,000us-gaap_NetIncomeLoss $ 3,211,000us-gaap_NetIncomeLoss $ 7,667,000us-gaap_NetIncomeLoss $ 37,368,000us-gaap_NetIncomeLoss $ 26,177,000us-gaap_NetIncomeLoss $ 32,279,000us-gaap_NetIncomeLoss
Accumulated deficit 338,273,000us-gaap_RetainedEarningsAccumulatedDeficit       300,905,000us-gaap_RetainedEarningsAccumulatedDeficit       338,273,000us-gaap_RetainedEarningsAccumulatedDeficit 300,905,000us-gaap_RetainedEarningsAccumulatedDeficit  
Net cash used                 30,330,000us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 34,563,000us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 32,193,000us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Periodic payments beginning August 2014                 1,000,000us-gaap_DebtInstrumentPeriodicPayment    
Long-term Debt, Current Maturities 7,363,000us-gaap_LongTermDebtCurrent       3,191,000us-gaap_LongTermDebtCurrent       7,363,000us-gaap_LongTermDebtCurrent 3,191,000us-gaap_LongTermDebtCurrent  
Joint Venture purchase obligation $ 3,000,000us-gaap_LiabilitiesOfBusinessTransferredUnderContractualArrangementCurrent               $ 3,000,000us-gaap_LiabilitiesOfBusinessTransferredUnderContractualArrangementCurrent