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Note 5 - Investments In Privately-held Companies (Tables)
 12 Months Ended
Jan. 28, 2017
Notes Tables  
Schedule of Equity Investments in and Financing Notes Receivable from Privately Held Companies [Table Text Block]
 
 
January 28,
2017
 
 
January 30,
2016
 
Investments
 
 
 
 
 
 
 
 
Issuer A
   $
2,000
     $
2,000
  
Issuer B
    
-
      
750
  
Issuer C
    
-
      
134
  
Total investments
   $
2,000
     $
2,884