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Note 3 - Restructuring Charges - Summaries of the Restructuring Activities and Associated Costs Incurred (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Liability $ 270 $ 735
Restructuring charges 48  
Cash payments (153)  
Liability 165 663
Restructuring charges (recoveries), net 48 (75)
Cash receipts (payments)   3
Equipment Relocation Costs [Member]    
Liability 31
Restructuring charges 48  
Cash payments (79)  
Liability
Restructuring charges (recoveries), net   75
Cash receipts (payments)   (75)
Employee Severance [Member]    
Liability 239 735
Restructuring charges  
Cash payments (74)  
Liability 165 663
Restructuring charges (recoveries), net  
Cash receipts (payments)   (72)
Facility Closing [Member]    
Liability
Restructuring charges  
Cash payments  
Liability
Restructuring charges (recoveries), net   30
Cash receipts (payments)   (30)
Gain on Sale of Property and Equipment [Member]    
Liability
Restructuring charges  
Cash payments  
Liability
Restructuring charges (recoveries), net   (180)
Cash receipts (payments)   $ 180