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Note 20 - Provisions (Tables)
 12 Months Ended
Mar. 31, 2019
Statement Line Items [Line Items]  
Disclosure of restructuring costs [text block]
Employee-related   $
8,706
  
Facilities    
1,987
  
Transition agreements    
3,187
  
Other non-headcount related    
2,198
  
Total restructuring costs    
16,078
  
         
Expended in the year    
9,462
  
Provision at end of the year    
6,616
  
Total restructuring costs   $
16,078