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Note 12 (Tables)
 9 Months Ended
Jun. 24, 2017
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
Three Months Ended June 24, 2017
    
Nine Months Ended June 24, 2017
  
    (unaudited)      (unaudited)   
    (in thousands)      (in thousands)  
             
   
Foreign
Currency 
Translation 
Adjustments
    
Unrealized 
Holding Gain on Marketable Securities
    
Total
    
Foreign
Currency
Translation Adjustments
    
Unrealized
Holding
Loss (Gain) on Marketable
Securities
    
Total
  
                                                 
Beginning Balance
   $
(12,296
 )   $
166
    $
(12,130
 )   $
(13,086
 )   $
(329
 )   $
(13,415
 )
                                                 
Other comprehensive income (loss)
before reclassifications
   
1,095
     
204
     
1,299
     
1,885
     
699
     
2,584
 
                                                 
Amounts reclassified from
accumulated other
comprehensive income
    
-
     
-
     
-
     
-
     
 
      
-
 
                                                 
Ending Balance
  $
(11,201
 )   $
370
    $
(10,831
 )   $
(11,201
 )   $
370
    $
(10,831
 )
   
Three Months Ended June 25, 2016
    
Nine Months Ended June 25, 2016
  
    (unaudited)     (unaudited)  
    (in thousands)      (in thousands)   
                                                 
   
Foreign
Currency
Translation Adjustments
    
Unrealized
Holding Loss on Marketable
Securities
    
Total
    
Foreign
Currency
Translation Adjustments
    
Unrealized
Holding Loss on Marketable
Securities
    
Total
  
                                                 
Beginning Balance
   $
(10,701
 )   $
(1,978
 )   $
(12,679
 )   $
(10,021
 )   $
(876
 )   $
(10,897
 )
                                                 
Other comprehensive income (loss)
before reclassifications
   
(1,387
 )    
534
     
(853
 )    
(2,067
 )    
(812
 )    
(2,879
 )
                                                 
Amounts reclassified from
accumulated other
comprehensive income
    
-
     
106
     
106
     
-
     
350
     
350
 
                                                 
Ending Balance
  $
(12,088
 )   $
(1,338
 )   $
(13,426
 )   $
(12,088
 )   $
(1,338
 )   $
(13,426
 )