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Subsequent Events (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
Aug. 07, 2022
Jun. 30, 2022
Dec. 31, 2021
Subsequent Events      
Common Stock, conversion rights value per share  
Subsequent event [Member]      
Subsequent Events      
Common Stock, par value per share $ 0    
Common Stock, conversion rights value per share $ 54    
Termination fee upon termination rights in merger agreement $ 12.5