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Note 8 - Commitments and Contingencies (Tables)
 3 Months Ended
Apr. 30, 2016
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
Three Months Ended
 
Balance
Beginning
of
Period
 
 
Additions
and
Adjustments
 
 
Deductions
 
 
Balance
End
of Period
 
April 30, 2016
   $ 959     $ 139     $ (138
)
   $ 960  
May 2, 2015
   $ 864     $ 140     $ (143
)
   $ 861