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Note 9 - Stock-Based Compensation - Stock Options Valuation Assumptions (Details)
12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Expected term (in years) 5 years 262 days 5 years 29 days 6 years
Risk-free interest rate 2.18% 0.38% 1.40%
Expected volatility 37.99% 39.57% 47.32%
Expected dividend yield 0.61% 0.60% 0.72%