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Debt (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Sep. 26, 2014
Debt Instrument [Line Items]      
Notes Payable $ 1.7us-gaap_NotesPayable $ 1.6us-gaap_NotesPayable  
Mortgages payable     20.0us-gaap_SecuredLongTermDebt
Debt Instrument, Periodic Payment 10.0us-gaap_DebtInstrumentPeriodicPayment    
Proceeds from Issuance of Debt 11.7us-gaap_ProceedsFromIssuanceOfDebt    
Debt Issuance Cost (0.1)us-gaap_PaymentsOfDebtIssuanceCosts    
Mortgage Loans on Real Estate, Carrying Amount of Mortgages 3.1us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages    
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two 2.1us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo    
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Three 5.7us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree    
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Four 5.7us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour    
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five 5.4us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive    
Long-term Debt 18.9us-gaap_LongTermDebt    
Interest expense 0.3us-gaap_InterestExpenseLongTermDebt    
Impaired Long-Lived Assets Held and Used, Asset Name [Domain]      
Debt Instrument [Line Items]      
Debt Instrument, Periodic Payment, Interest 8.00%us-gaap_DebtInstrumentInterestRateDuringPeriod
/ us-gaap_DebtInstrumentAxis
= us-gaap_PaymentGuaranteeMember
   
Long-term Debt [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum 8.50%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_DebtInstrumentAxis
= us-gaap_LongTermDebtMember
   
NeoStem, Inc. [Member] | Long-term Debt [Member]      
Debt Instrument [Line Items]      
Debt Instrument, Period of Loan 36 months    
Debt Instrument, Payment Terms 30 months    
License Agreement Terms [Member]      
Debt Instrument [Line Items]      
Long-term Debt, Gross     $ 5.0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_LicenseAgreementTermsMember