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Note 20 - Other Charges (Tables)
12 Months Ended
Jan. 31, 2020
Notes Tables  
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]
Year Ended    
January 31,
     
January 31,
     
January 31,
 
      2020       2019       2018  
Acquisition-related costs    
3,797
     
3,778
     
3,471
 
Restructuring plans    
     
20
     
523
 
     
3,797
     
3,798
     
3,994