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Note L - Stock Options (Details Textual) - USD ($) | 12 Months Ended
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Sep. 28, 2019 | Sep. 29, 2018 | Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 454,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date | 85.00% |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ 9,400,000 | $ 6,800,000 | $ 10,100,000
Proceeds from Stock Options Exercised | 12,700,000 | 7,400,000 | 5,800,000
Share-based Payment Arrangement, Exercise of Option, Tax Benefit | $ 1,800,000 | $ 1,700,000 | $ 3,000,000.0
Incentive Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 26.29 | $ 23.68 | $ 18.84
Non-qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 33.11 | $ 31.44 | $ 24.82
Employee Stock Purchase Plan [Member] |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans | 12,492 | 12,763 | 13,271
Share Price | $ 121.37 | $ 119.39 | $ 105.85
Share-based Payment Arrangement, Expense | $ 390,000 | $ 423,000 | $ 363,000

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