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The Business - Principles of Consolidation (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Mar. 11, 2016
Subsidiary or Equity Method Investee [Line Items] |  |  |
Equity Method Investment, Ownership Percentage |  |  | 19.90%
Change in Ownership in Subsidiary | $ 0 | $ 0 |
Subsidiary, Ownership Interest by Parent |  |  | 80.10%
Hitachi America [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Equity Method Investment, Ownership Percentage | 19.90% |  | 21.00%
NeoStem, Inc. [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Subsidiary, Ownership Interest by Parent | 100.00% |  |
Athelos Corporation [Member] | Becton Dickson [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Noncontrolling Interest in Variable Interest Entity | $ 0.016 |  |
Location [Member] | NeoStem, Inc. [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Entity Location | United States of America |  |
Location [Member] | Amorcyte, LLC [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Entity Location | United States of America |  |
Location [Member] | Progenitor Cell Therapy, LLC [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Entity Location | United States of America |  |
Location [Member] | NeoStem Family Storage, LLC [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Entity Location | United States of America |  |
Location [Member] | Athelos Corporation [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Entity Location | United States of America |  |
Location [Member] | PCT Allendale, LLC [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Entity Location | United States of America |  |
UNITED STATES | Amorcyte, LLC [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Subsidiary, Ownership Interest by Parent | 100.00% |  |
UNITED STATES | Progenitor Cell Therapy, LLC [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Subsidiary, Ownership Interest by Parent | 80.10% |  |
UNITED STATES | NeoStem Family Storage, LLC [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Subsidiary, Ownership Interest by Parent | 80.10% |  |
UNITED STATES | Athelos Corporation [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Subsidiary, Ownership Interest by Parent | 98.40% |  |
UNITED STATES | PCT Allendale, LLC [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Subsidiary, Ownership Interest by Parent | 80.10% |  |
UNITED STATES | NeoStem Oncology [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Subsidiary, Ownership Interest by Parent | 100.00% |  |
Entity Location | United States of America |  |

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