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Tax Note (Tables)
 12 Months Ended
Mar. 31, 2022
Major components of tax expense (income) [abstract]  
Schedule of effective income tax expense (recovery) [Table Text Block]
    March 31, 2022     March 31, 2021  
             
Income for the year from continuing operations before tax $ 82,038,129   $ 24,295,608  
             
Expected income tax $ 22,150,000   $ 9,821,366  
Change in statutory, foreign tax, foreign exchange rates and other   (28,417,000 )   (13,449,000 )
Permanent differences   7,629,000     4,799,000  
Impact on sale of subsidiary   -     3,924,000  
Share issue cost   (1,885,000 )   (497,000 )
Adjustment to prior years provision and other   6,686,000     1,803,000  
Change in unrecognized deductible temporary differences   (3,747,000 )   (6,250,000 )
Tax expense $ 2,416,000   $ 151,366  
             
Current income tax $ 887,000   $ 151,366  
Deferred income tax   1,529,000     -  
Total income tax $ 2,416,000   $ 151,366  
Schedule of components of deferred tax assets and liabilities [Table Text Block]
    March 31, 2022     March 31, 2021  
Deferred tax assets (liabilities)            
   Plant and equipment $ (12,802,000 ) $ -  
   Energy tax receivable   (490,000 )   (490,000 )
   Digital currencies   (186,000 )   (266,000 )
   Right of use asset and lease liability   14,000     -  
   Investments   -     (107,000 )
   Non-capital losses   11,935,000     863,000  
  $ (1,529,000 ) $ -  
Schedule of temporary difference, unused tax losses and unused tax credits [Table Text Block]
    March 31, 2022     March 31, 2021     Expiry  
Intangible asset $ 4,933,000   $ 6,209,000     NA  
Share issue costs and other   6,142,000     5,162,000     2042 - 2045  
Loss carryforwards   72,893,000     75,393,000     2025 - Indefinite  
Intercompany loan   -     12,884,000     NA  
Plant and equipment   14,539,000     4,368,000     NA  
  $ 98,507,000   $ 104,016,000