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Note 5 - Intangible Assets (Tables)
 3 Months Ended
Dec. 30, 2017
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
(In thousands)
  
Gross Amount
    
Accumulated
Amortization
    
Net Book Value
  
As of December 30, 2017:
                        
Customer relationships
   $
9,070
     $
(1,142
 )   $
7,928
  
Developed technology and know-how
    
1,800
      
(305
 )    
1,495
  
Non-competition agreements
    
3,687
      
(2,611
 )    
1,076
  
Trade name
    
140
      
(5
 )    
135
  
    $
14,697
     $
(4,063
 )   $
10,634
  
                         
As of September 30, 2017:
                        
Customer relationships
   $
6,500
     $
(1,018
 )   $
5,482
  
Developed technology and know-how
    
1,800
      
(283
 )    
1,517
  
Non-competition agreements
    
3,577
      
(2,663
 )    
914
  
    $
11,877
     $
(3,964
 )   $
7,913