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INCOME TAX (Tables)
 12 Months Ended
Mar. 31, 2022
Disclosure of income tax [text block] [Abstract]  
Schedule of Income Tax Expense Recognized
   Year ended March 31, 
Income tax expense  2022   2021 
Current  $8,760   $10,942 
Deferred   5,028    2,052 
   $13,788   $12,994 

 
Schedule of Reconciliation of Effective Statutory Income Tax Rates
   Years ended March, 31 
   2022   2021 
Canadian statutory tax rate   27.00%   27.00%
Income before income taxes  $57,072   $73,503 
Income tax expense computed at Canadian statutory rates   15,409    19,846 
Foreign tax rates different from statutory rate   (3,398)   (7,172)
Permanent items   635    2,567 
Withholding taxes   1,428    1,191 
Change in unrecognized deferred tax assets   (286)   (3,438)
Income tax expense  $13,788   $12,994 

 
Schedule of Deferred Income Tax Assets (liabilities)
   Years ended March, 31 
   2022   2021 
Net deferred income tax liabilities, beginning of the year  $(40,792)  $(35,758)
Deferred income tax expense recognized in net income for the year    (5,028)   (2,052)
Deferred income tax expense recognized in other comprehensive income for the year   122    
-
 
Foreign exchange impact   (1,430)   (2,982)
Net deferred income tax liabilities, end of the year  $(47,128)  $(40,792)

 
Schedule of Deferred Income Tax
   March 31, 2022   March 31, 2021 
Deferred income tax assets        
Plant and equipment  $2,230   $1,706 
Environmental rehabilitation   2,021    1,716 
Unrealized loss on investments   122    
-
 
Other deductible temporary difference   133    655 
Total deferred income tax assets   4,506    4,077 
           
Deferred income tax liabilities          
Plant and equipment   (2,024)   (1,488)
Mineral rights and properties   (49,386)   (43,105)
Unrealized gain on investments   
-
    
-
 
Other taxable temporary difference   (224)   (276)
Total deferred income tax liabilities   (51,634)   (44,869)
                 
Net deferred income tax liabilities   (47,128)   (40,792)
           
Of which          
-Deferred tax assets   905    
-
 
-Deferred tax liabilities  $(48,033)  $(40,792)

 
Schedule of Temporary Differences and Unused Tax Losses
   March 31, 2022   March 31, 2021 
Non-capital loss carry forward  $69,341   $62,764 
Plant and equipment   2,331    10,813 
Mineral rights and properties   2,006    1,972 
Other deductible temporary difference   21,088    21,669 
   $94,766   $97,218 

 
Schedule of Net Operating Losses Expiring in Various Years
   Canada   China   Total 
2023  $
-
   $1,105   $1,105 
2024   
-
    1,322    1,322 
2025   
-
    902    902 
2026   
-
    267    267 
2027   
-
    1,308    1,308 
2030   1,175    
-
    1,175 
2031   6,820    
-
    6,820 
2032   9,893    
-
    9,893 
2033   10,181    
-
    10,181 
2034   8,001    
-
    8,001 
2035   7,266    
-
    7,266 
2036   54    
-
    54 
2037   585    
-
    585 
2038   2,555    
-
    2,555 
2039   4,719    
-
    4,719 
2040   2,155    
-
    2,155 
2041   4,281    
-
    4,281 
2042   6,752    
-
    6,752 
   $64,437   $4,904   $69,341