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Note 4 - Fair Value Measurements - Fair Value of Financial Assets (Details) - USD ($)
$ in Thousands
Jun. 27, 2015
Sep. 27, 2014
Fair Value, Inputs, Level 1 [Member]    
Current assets:    
Cash equivalents $ 11,450 $ 3,320
Other assets    
Cash surrender value of life insurance policies    
Total $ 11,450 $ 3,320
Fair Value, Inputs, Level 2 [Member]    
Current assets:    
Cash equivalents    
Other assets    
Cash surrender value of life insurance policies $ 7,344 $ 6,867
Total 7,344 6,867
Cash equivalents 11,450 3,320
Cash surrender value of life insurance policies 7,344 6,867
Total $ 18,794 $ 10,187