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Basis of Presentation and Significant Accounting Policies (Narrative) (Details)
 12 Months Ended
Mar. 31, 2022
Data center mining equipment [Member] | Maximum [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful life measured as period of time of plant and equipment, major assets 4 years
Data center mining equipment [Member] | Minimum [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful life measured as period of time of plant and equipment, major assets 2 years
Buildings [Member]  
Disclosure of detailed information about property, plant and equipment [line items]  
Useful life measured as period of time of plant and equipment, major assets 15 years