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The Business (Q1) (Details) - USD ($)
$ in Thousands
Apr. 26, 2022
Dec. 31, 2017
Feb. 28, 2017
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