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Note 10 - Income Taxes (Tables)
 6 Months Ended
Jul. 31, 2019
Notes Tables  
Summary of Valuation Allowance [Table Text Block]
Jurisdiction
  
July 31,
2019
    
January 31,
2019
  
U.S. federal and state
   $
26.8
     $
24.7
  
Irish Principal
    
9.9
      
-
  
Brazil
    
5.4
      
5.2
  
Germany
    
2.7
      
2.9
  
Hong Kong
    
1.2
      
1.2
  
South Africa
    
0.2
      
-
  
Belgium
    
-
      
0.9
  
Total valuation allowance
   $
46.2
     $
34.9