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Note 7 - Stock-based Compensation - Stock Option Valuation Assumptions (Details) - Share-Based Payment Arrangement, Option [Member]
9 Months Ended
Jul. 02, 2022
Jul. 03, 2021
Risk-free interest rate 1.92% 0.56%
Dividend yield 0.30% 0.48%
Expected volatility 48.92% 51.47%
Expected term (in years) (Year) 4 years 7 months 24 days 4 years 11 months 1 day