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Note 16 - Financial Expenses
 12 Months Ended
Mar. 31, 2019
Statement Line Items [Line Items]  
Disclosure of finance income (cost) [text block]
16.
 Financial expenses:
 
                Thirteen-
months ended		     Month ended     Twelve-month
period ended		  
   
March 31,

2019		    
March 31,

2018		    
March 31,

2017		    
March 31,

2017
(Unaudited)		    
February 28,

2017
(Unaudited)		  
    $     $     $     $     $  
                               
Interest income    
475
      
72
      
125
      
6
      
119
  
Foreign exchange gain (loss)    
279
      
(32
 )    
(180
 )    
(3
 )    
(177
 )
Interest payable on convertible debenture    
(160
 )    
(160
 )    
(17
 )    
(14
 )    
(3
 )
Accretion of interest on convertible debenture    
(205
 )    
(206
 )    
(22
 )    
(17
 )    
(5
 )
Transaction costs related to derivative warrant liabilities    
(653
 )    
(1,134
 )    
-
      
-
      
-
  
Change in fair value of warrant liabilities    
(6,287
 )    
(344
 )    
(53
 )    
(22
 )    
(31
 )
Other charges    
-
      
(4
 )    
(19
 )    
(1
 )    
(18
 )
                                         
Financial expenses    
(6,551
 )    
(1,808
 )    
(166
 )    
(51
 )    
(115
 )