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Schedule II (Tables)
 12 Months Ended
Jan. 31, 2020
Notes Tables  
Summary of Valuation Allowance [Table Text Block]
(In thousands)
  
Balance at beginning of period
  
Charges to expenses
  
Write-offs (1)
  
Other charges (2)
  
Balance at end of period
Year Ended January 31, 2020
                                        
Allowance for possible losses in collection of trade receivables
   $
536
 
   $
123
 
   $
(254
)
   $
2
 
   $
407
 
                                         
Year Ended January 31, 2019
                                        
Allowance for possible losses in collection of trade receivables
   $
469
 
   $
140
 
   $
(272
)
   $
199
 
   $
536