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The Business Principal of consolidation (Details)	Mar. 31, 2015
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	96.60%nbs_SubsidiaryOwnershipInterestByParent
NeoStem, Inc. [Member]
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	100.00%nbs_SubsidiaryOwnershipInterestByParent / dei_LegalEntityAxis = nbs_NeostemIncMember
NeoStem Therapies, Inc [Member] | UNITED STATES
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	100.00%nbs_SubsidiaryOwnershipInterestByParent / dei_EntityByLocationAxis = country_US / dei_LegalEntityAxis = nbs_NeostemTherapiesIncMember
Stem Cell Technologies, Inc [Member] | UNITED STATES
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	100.00%nbs_SubsidiaryOwnershipInterestByParent / dei_EntityByLocationAxis = country_US / dei_LegalEntityAxis = nbs_StemCellTechnologiesIncMember
Amorcyte, LLC [Member] | UNITED STATES
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	100.00%nbs_SubsidiaryOwnershipInterestByParent / dei_EntityByLocationAxis = country_US / dei_LegalEntityAxis = nbs_AmorcyteLlcMember
Progenitor Cell Therapy, LLC [Member] | UNITED STATES
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	100.00%nbs_SubsidiaryOwnershipInterestByParent / dei_EntityByLocationAxis = country_US / dei_LegalEntityAxis = nbs_ProgenitorCellTherapyLlcMember
NeoStem Family Storage, LLC [Member] | UNITED STATES
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	100.00%nbs_SubsidiaryOwnershipInterestByParent / dei_EntityByLocationAxis = country_US / dei_LegalEntityAxis = nbs_NeostemFamilyStorageLlcMember
PCT Allendale, LLC [Member] | UNITED STATES
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	100.00%nbs_SubsidiaryOwnershipInterestByParent / dei_EntityByLocationAxis = country_US / dei_LegalEntityAxis = nbs_PctAllendaleLlcMember
NeoStem Oncology [Member] | UNITED STATES
Schedule of Subisidiary [Line Items]
Subsidiary, Ownership Interest by Parent	100.00%nbs_SubsidiaryOwnershipInterestByParent / dei_EntityByLocationAxis = country_US / dei_LegalEntityAxis = nbs_NeoStemOncologyMember

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