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The Business (Q1) (Details) - USD ($) $ in Thousands | Apr. 26, 2022 | Dec. 31, 2017 | Feb. 28, 2017
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Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |
Grants awarded |  |  | $ 12,200
Subsequent event | Merger Agreement | Cend |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |
Expected post-merger ownership in Company by Cend stockholders (percent) | 50.00% |  |
Expected post-merger ownership in Company by Company stockholders (percent) | 50.00% |  |
Transaction expenses threshold for allocation | $ 250 |  |
CLBS16 Treatment of CMD |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |
Grants awarded |  | $ 1,900 |

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