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Note 8 - Trade and Other Payables (Tables)
6 Months Ended
Sep. 30, 2020
Statement Line Items [Line Items]  
Disclosure of detailed information about trade and other payables [text block]
    As at     As at  
    Sept. 30, 2020     March 31, 2020  
Commodity suppliers' accruals and payables   $
379,686
    $
414,581
 
Green provisions and repurchase obligations    
80,766
     
103,245
 
Sales tax payable    
21,072
     
19,706
 
Non-commodity trade accruals and accounts payable    
56,921
     
117,473
 
Current portion of payable to former joint venture partner    
16,734
     
18,194
 
Accrued gas payable    
-
     
3,295
 
Other payables    
13,734
     
9,171
 
    $
568,913
    $
685,665