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Note 3 - Business Combination - Summaries of the Restructuring Activities and Associated Costs Incurred (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 02, 2016
Jan. 02, 2016
Mar. 28, 2015
Dec. 27, 2014
Apr. 02, 2016
Mar. 28, 2015
Employee Severance [Member]            
Liability, beginning balance $ 663 $ 735 $ 1,155 $ 1,208 $ 735 $ 1,208
Restructuring charges (recoveries)     75      
Cash payments/receipts (59) (72) (58) (53)    
Liability, ending balance 604 663 1,172 1,155 604 1,172
Equipment Relocation Costs [Member]            
Restructuring charges (recoveries) 21 75        
Cash payments/receipts (21) (75)        
Facility Closing [Member]            
Liability, beginning balance            
Restructuring charges (recoveries) 59 30 21      
Cash payments/receipts (39) (30) (4)      
Liability, ending balance 20   17   20 17
Gain on Sale of Property and Equipment [Member]            
Restructuring charges (recoveries)   (180)        
Cash payments/receipts   180        
Asset Impairment Charges [Member]            
Restructuring charges (recoveries) 20   237      
Non-cash charges (20)   (237)      
Liability, beginning balance 663 735 1,155 1,208 735 1,208
Restructuring charges (recoveries) 100   333   25 333
Restructuring charges (recoveries)   (75)        
Cash payments/receipts (119)   (62) (53)    
Cash payments/receipts   3        
Liability, ending balance 624 $ 663 1,189 $ 1,155 $ 624 $ 1,189
Non-cash charges $ (20)   $ (237)