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v3.23.3

Note A - Summary of Significant Accounting Policies (Details Textual) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2023 USD ($) shares | Sep. 24, 2022 USD ($) shares | Sep. 25, 2021 USD ($) shares
Contract with Customer, Asset, Allowance for Deductions | $ 18,900 | $ 14,700 |
Accounts Receivable, Allowance for Credit Loss | 3,200 | 2,200 |
Cash, Uninsured Amount | 14,000 |  |
Accounts Receivable, after Allowance for Credit Loss | $ 198,100 | 208,200 |
Employees Covered Under Collective Bargaining Agreement, Percentage | 28.00% |  |
Unrecognized Tax Benefits | $ 343 | 343 |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ 300 | $ 300 |
Effective Income Tax Rate Reconciliation, Percent | 26.60% | 23.50% | 24.90%
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares | 252,044 | 287,558 | 284,480
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate |  | 25.80% | 25.80%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate |  | 0.80% | 0.80%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate |  | 1.60% | 1.40%
Advertising Expense | $ 9,700 | $ 7,000 | $ 4,900
Unrecorded Unconditional Purchase Obligation | 125,000 |  |
Research and Development Expense | $ 1,200 | $ 700 | $ 600
Five Year Options [Member] |  |  |
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions Volatility Calculation Term (Month) |  | 51 months |
Ten Year Options [Member] |  |  |
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions Volatility Calculation Term (Month) |  | 10 years |
Restricted Stock Units (RSUs) [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) | shares | 21,864 | 9,200 | 0
Performance Shares [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period (in shares) | shares | 21,260 | 8,868 | 0
Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |
Number of Major Customers | 10 | 10 | 10
Minimum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 2 years |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) |  | 4 years | 4 years
Maximum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 20 years |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) |  | 10 years | 10 years
Customer Group One [Member] |  |  |
Approximate Number of Customers | 31 |  |
Customer Group One [Member] | Minimum [Member] |  |  |
Accounts Receivable, after Allowance for Credit Loss | $ 1,000 |  |
Customer Group One [Member] | Maximum [Member] |  |  |
Accounts Receivable, after Allowance for Credit Loss | 10,000 |  |
Five Customers [Member] | Minimum [Member] |  |  |
Accounts Receivable, after Allowance for Credit Loss | 10,000 |  |
Largest Customer [Member] |  |  |
Accounts Receivable, after Allowance for Credit Loss | $ 24,000 |  |
Largest Customer [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |
Concentration Risk, Percentage | 9.00% | 8.00% | 11.00%
Top Ten Customers [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |
Concentration Risk, Percentage | 43.00% | 43.00% | 43.00%

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