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Note 10 - Other Retirement Plans (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Sep. 26, 2021 | Sep. 27, 2020 | Sep. 29, 2019
Employee Benefits and Share-based Compensation | $ 3,403,000 | $ 2,666,000 | $ 1,683,000
Multiemployer Plans, Withdrawal Obligation | $ 12,862,000 |  |
Percentage of CBA's Expiring in the Next Twelve Months | 97.00% |  |
Minimum [Member] |  |  |
Multiemployer Plans, Withdrawal Obligation, Period (Year) | 20 years |  |
Warrants and Other Liabilities [Member] |  |  |
Multiemployer Plans, Withdrawal Obligation | $ 23,471,000 | $ 11,473,000 |

X
- Definition The period of time in which an obligation recognized by withdrawing from a pension or postretirement benefit plan will be paid. + References No definition available. + Details
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X
- Definition Represents the percentage of CBA's expiring in the next twelve months. + References No definition available. + Details
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X
- Definition Amount of the obligation recognized by withdrawing from a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References No definition available. + Details
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- Details
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