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Basis of Presentation, Description of Business and Summary of Significant Accounting Policies (Narrative) (Details)
3 Months Ended 15 Months Ended
Mar. 31, 2022
USD ($)
segment
Mar. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
Basis of Presentation, Description of Business and Summary of Significant Accounting Policies [Abstract]      
Short-term lease expense $ 0 $ 0  
Number of Reportable Segments | segment 1    
Impairment charges     $ 0