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Note A - Summary of Significant Accounting Policies (Details Textual) | 12 Months Ended |
--- | --- | ---
Sep. 26, 2020 USD ($) shares | Sep. 28, 2019 USD ($) shares | Sep. 29, 2018 USD ($) shares | Sep. 29, 2019 USD ($)
Liability for Allowances, End-user Pricing Adjustments and Trade Spending | $ 14,300,000 | $ 14,800,000 |  |
Accounts Receivable, Allowance for Credit Loss, Ending Balance | 1,388,000 | 572,000 |  |
Cash, Uninsured Amount | 40,000,000 |  |  |
Accounts Receivable, after Allowance for Credit Loss, Total | $ 126,587,000 | 140,938,000 |  |
Employees Covered Under Collective Bargaining Agreement, Percentage | 28.00% |  |  |
Unrecognized Tax Benefits, Ending Balance | $ 360,000 | 414,000 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total | 267,000 | 279,000 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total | 12,000 | $ 0 |  |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  |  | $ (20,700,000) |
Income Tax Expense (Benefit), Continuing Operations, Changed in Tax Rate, Tax Cut and Jobs Act |  |  | (8,800,000) |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount | $ 0 |  | $ 1,200,000 |
Effective Income Tax Rate Reconciliation, Percent, Total | 25.00% | 25.80% | 27.70% |
Effective Income Tax Rate Reconciliation, Changed in Prior Tax for Repatriation of Foreign Earnings, Amount |  | $ (885,000) |  |
Effective Income Tax Rate Reconciliation, State Deferred Taxes and Provision to Return Adjustment, Amount | $ 2,200,000 |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares | 341,849 | 162,070 | 1,000 |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $ 5,600,000 |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate | 17.40% | 17.20% | 17.40% |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | 3.00% | 2.10% | 2.70% |
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 1.80% | 1.20% | 1.30% |
Share-based Compensation Arrangement by Share-based Payment Award Fair Value Assumptions Expected Forfeiture Rate | 8.00% | 8.00% | 10.00% |
Advertising Expense | $ 6,461,000 | $ 5,938,000 | $ 5,805,000 |
Unrecorded Unconditional Purchase Obligation, Total | 75,000,000 |  |  |
Research and Development Expense, Total | 680,000 | 645,000 | 623,000 |
Operating Lease, Right-of-Use Asset | 58,110,000 | $ 0 |  |
Operating Lease, Liability, Total | $ 60,861,000 |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  | $ 71,000,000
Operating Lease, Liability, Total |  |  |  | $ 72,000,000
Ten Year Options [Member] |  |  |  |
Expected Volatility Term (Month) | 10 years |  |  |
New Jersey Division of Taxation [Member] | State and Local Jurisdiction [Member] |  |  |  |
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  |  | $ 1,400,000 |
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) | 5 years |  |  |
Minimum [Member] | 5 year options [Member] |  |  |  |
Expected Volatility Term (Month) | 49 months |  |  |
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 |  |  |
Maximum [Member] | 5 year options [Member] |  |  |  |
Expected Volatility Term (Month) | 51 months |  |  |
Customer Group One [Member] |  |  |  |
Approximate Number of Customers | 16 |  |  |
Customer Group One [Member] | Minimum [Member] |  |  |  |
Accounts Receivable, after Allowance for Credit Loss, Total | $ 1,000,000 |  |  |
Customer Group One [Member] | Maximum [Member] |  |  |  |
Accounts Receivable, after Allowance for Credit Loss, Total | 10,000,000 |  |  |
One Customer [Member] |  |  |  |
Accounts Receivable, after Allowance for Credit Loss, Total | $ 15,000,000 |  |  |
Top Ten Customers [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |
Concentration Risk, Percentage | 43.00% | 43.00% | 43.00% |
Largest Customer [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member] |  |  |  |
Concentration Risk, Percentage | 13.00% | 11.00% | 9.50% |

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Namespace Prefix: |
Data Type: | na
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Period Type: |

X
- Details
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Period Type: |

X
- Details
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- Details
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