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The Business (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Feb. 28, 2017
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Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |
Grants awarded |  | $ 12.2
CLBS16 Treatment of CMD |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |
Grants awarded | $ 1.9 |

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- Definition Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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