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The Business CLBS03 (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2015 cohort | May 04, 2017 USD ($) | Feb. 23, 2017 USD ($)
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |
Interim Efficacy Analysis, Percentage Threshold | 50.00% |  |
Interim Efficacy Analysis, Follow-up Milestone Period | 6 years |  |
Grants Receivable |  |  | $ 12.2
The Sanford Project: T-Rex Study [Member] |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |
Number of Cohorts | cohort | 2 |  |
Subsequent Event [Member] |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |
Grants Receivable, Current |  | $ 5.7 |

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