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Note 11 - Commitments and Contingencies (Tables)
12 Months Ended
Jan. 31, 2018
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
2019
  $
6.0
 
2020
   
4.3
 
2021
   
2.5
 
2022
   
0.8
 
2023
   
0.5
 
Thereafter
   
0.2
 
    $
14.3