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Note 5 - Trade Receivables (Tables)
12 Months Ended
Jan. 31, 2018
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
     
January 31,

2018
     
January 31,

2017
 
Trade receivables    
30,111
     
26,495
 
Less: Allowance for doubtful accounts    
(1,319
)    
(1,094
)
     
28,792
     
25,401