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Note 11 - Employee Benefit Plans - Net Periodic Pension Costs and Related Components (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Pension Plan [Member]      
Interest cost $ 130 $ 137 $ 128
Expected return on plan assets (181) (165) (142)
Amortization of net loss 53 43 56
Net periodic pension cost 2 15 42
Supplemental Employee Retirement Plan [Member]      
Interest cost 323 315 287
Amortization of net loss 117 52 136
Net periodic pension cost 727 586 892
Service cost $ 287 $ 219 242
Prior service cost $ 227