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Note 9 - Intangible Assets (Tables)
12 Months Ended
Jan. 31, 2021
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
      January 31,       January 31,  
      2021       2020  
Cost                
Customer agreements and relationships    
240,479
     
226,514
 
Existing technology    
295,161
     
262,614
 
Trade names    
8,844
     
8,582
 
Non-compete covenants    
10,939
     
9,985
 
     
555,423
     
507,695
 
Accumulated amortization                
Customer agreements and relationships    
119,361
     
98,241
 
Existing technology    
183,539
     
142,757
 
Trade names    
5,996
     
5,124
 
Non-compete covenants    
6,535
     
4,617
 
     
315,431
     
250,739
 
Net    
239,992
     
256,956