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Note I - Income Taxes (Details Textual) - USD ($) | 12 Months Ended
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Sep. 29, 2018 | Sep. 30, 2017 | Sep. 24, 2016
Increase (Decrease) in Deferred Income Taxes |  | $ 6,632,000 |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 24.50% | 35.00% | 35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability | $ (20,900,000) |  |
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | (20,670,000) |  |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount | $ 1,200,000 |  |
Effective Income Tax Rate Reconciliation, Percent, Total | 27.80% | 35.20% |
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense | $ 1,935,000 | $ 3,061,000 | $ 1,980,000
Capital Loss Carryforward [Member] |  |  |
Tax Credit Carryforward, Amount | 4,200,000 |  |
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 |  |
Internal Revenue Service (IRS) [Member] | Domestic Tax Authority [Member] | PHILLY SWIRL [Member] |  |  |
Operating Loss Carryforwards, Total | 4,000,000 |  |
Operating Loss Carryforwards, Subject to Limitation and Expiration | 378,000 |  |
Operating Loss Carryforwards, Valuation Allowance, Total | $ 0 |  |

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