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Note 11 - Commitments and Contingencies (Tables)
12 Months Ended
Jan. 31, 2019
Notes Tables  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
2020
  $
5.6
 
2021
   
4.6
 
2022
   
2.8
 
2023
   
1.8
 
2024
   
1.5
 
Thereafter
   
2.8
 
    $
19.1