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The Business (Details) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
The Company [Line Items]    
Subsidiary, Ownership Interest by Parent 96.60%nbs_SubsidiaryOwnershipInterestByParent  
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 3.40%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners  
Change in Ownership in Subsidiary $ 0nbs_ChangeinOwnershipinSubsidiary $ 0nbs_ChangeinOwnershipinSubsidiary
Noncontrolling Interest [Member]    
The Company [Line Items]    
Change in Ownership in Subsidiary $ 50,537nbs_ChangeinOwnershipinSubsidiary
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember		 $ 86,617nbs_ChangeinOwnershipinSubsidiary
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
NeoStem, Inc. [Member]    
The Company [Line Items]    
Subsidiary, Ownership Interest by Parent 100.00%nbs_SubsidiaryOwnershipInterestByParent
/ dei_LegalEntityAxis
= nbs_NeostemIncMember