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Operating Assets and Liabilities - Depreciation (Details)
12 Months Ended
Dec. 31, 2021
Equipment, furniture and fixtures | Bottom of range [member]  
Property, Plant and Equipment  
Expected useful lives of assets 3 years
Equipment, furniture and fixtures | Top of range [member]  
Property, Plant and Equipment  
Expected useful lives of assets 5 years
Computer equipment [member]  
Property, Plant and Equipment  
Expected useful lives of assets 3 years
Leasehold improvements  
Property, Plant and Equipment  
Expected useful lives of assets 15 years