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Note 5 - Intangible Assets (Tables)
 3 Months Ended
Dec. 29, 2018
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
(In thousands)
  
Gross Amount
    
Accumulated Amortization
    
Net Book Value
  
As of December 29, 2018:
                        
Customer relationships
   $
9,070
     $
(1,750
 )   $
7,320
  
Developed technology and know-how
    
1,800
      
(394
 )    
1,406
  
Non-competition agreements
    
1,800
      
(1,197
 )    
603
  
Trade name
    
140
      
(40
 )    
100
  
    $
12,810
     $
(3,381
 )   $
9,429
  
                         
As of September 29, 2018:
                        
Customer relationships
   $
9,070
     $
(1,598
 )   $
7,472
  
Developed technology and know-how
    
1,800
      
(371
 )    
1,429
  
Non-competition agreements
    
3,687
      
(2,994
 )    
693
  
Trade name
    
140
      
(31
 )    
109
  
    $
14,697
     $
(4,994
 )   $
9,703