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Note 9 - Intangible Assets (Tables)
12 Months Ended
Jan. 31, 2020
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
     
January 31,
     
January 31,
 
      2020       2019  
Cost                
Customer agreements and relationships    
226,514
     
177,224
 
Existing technology    
262,614
     
184,641
 
Trade names    
8,582
     
7,754
 
Non-compete covenants    
9,985
     
6,173
 
     
507,695
     
375,792
 
Accumulated amortization                
Customer agreements and relationships    
98,241
     
82,028
 
Existing technology    
142,757
     
110,051
 
Trade names    
5,124
     
4,456
 
Non-compete covenants    
4,617
     
3,065
 
     
250,739
     
199,600
 
Net    
256,956
     
176,192