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The Business - Narrative (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 20 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2018 patient | May 31, 2017 USD ($) | Oct. 31, 2016 patient | Mar. 31, 2016 cohort | Sep. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Feb. 28, 2017 USD ($)
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |  |  |
Grants awarded |  |  |  |  |  | $ 8.6 |  | $ 12.2
Funding of grant award |  | $ 5.7 |  |  | $ 7.9 |  |  |
Ischemic Repair (CD34 Cell Technology) [Member] |  |  |  |  |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |  |  |
Grants awarded |  |  |  |  |  |  | $ 1.9 |
The Sanford Project: T-Rex Study [Member] |  |  |  |  |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |  |  |  |  |
Number of cohorts | cohort |  |  |  | 2 |  |  |  |
Number of patients enrolled | patient | 110 |  | 19 |  |  |  |  |
Interim efficacy analysis, threshold (percent) |  |  | 50.00% |  |  |  |  |
Interim efficacy analysis, follow-up milestone period |  |  | 6 months |  |  |  |  |

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