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Note 11 - Commitments and Contingencies (Details Textual) | 2 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2017 USD ($) | Oct. 01, 2016 USD ($) | Oct. 03, 2015 USD ($) | Oct. 02, 2017 USD ($)
Insurance Recoveries |  |  |  | $ 2,000,000 |
Operating Leases, Rent Expense |  | $ 1,800,000 | $ 1,800,000 | 1,800,000 |
Operating Leases, Future Minimum Payments Due, Next Twelve Months | $ 984,000 | 984,000 |  |  |
Operating Leases, Future Minimum Payments, Due in Two Years | 498,000 | 498,000 |  |  |
Operating Leases, Future Minimum Payments, Due in Three Years | 136,000 | 136,000 |  |  |
Operating Leases, Future Minimum Payments, Due in Four Years | 2,000 | 2,000 |  |  |
Operating Leases, Future Minimum Payments, Due Thereafter | 1,000 | $ 1,000 |  |  |
Change in Control Agreement [Member] |  |  |  |  |
Guarantee Obligations Term |  | 2 years |  |  |
Change in Control Agreement Renewal [Member] |  |  |  |  |
Guarantee Obligations Term |  | 1 year |  |  |
Chief Executive Officer and Chief Financial Officer [Member] | Severance Agreement [Member] |  |  |  |  |
Guarantee Obligations Term |  | 2 years |  |  |
Ratio of Severance Benefits to Base Compensation |  | 1.5 |  |  |
Severance Benefits Continuation of Health and Welfare Benefits Term |  | 1 year 180 days |  |  |
Chief Executive Officer and Chief Financial Officer [Member] | Severance Agreement Renewal [Member] |  |  |  |  |
Guarantee Obligations Term |  | 1 year |  |  |
Chief Executive Officer and Chief Financial Officer [Member] | Change in Control Agreement [Member] |  |  |  |  |
Ratio of Severance Benefits to Base Compensation |  | 2 |  |  |
Severance Benefits Continuation of Health and Welfare Benefits Term |  | 2 years |  |  |
Guarantor Obligations Triggering Event Term from Change in Control to Termination |  | 2 years |  |  |
Ratio of Severance Benefits to the Average Bonus for the Prior Three Years |  | 2 |  |  |
Key Members of Management [Member] | Change in Control Agreement [Member] |  |  |  |  |
Ratio of Severance Benefits to Base Compensation |  | 1 |  |  |
Severance Benefits Continuation of Health and Welfare Benefits Term |  | 1 year |  |  |
Ratio of Severance Benefits to the Average Bonus for the Prior Three Years |  | 1 |  |  |
Non-cancelable Purchase Commitment for Raw Material [Member] |  |  |  |  |
Purchase Commitment, Remaining Minimum Amount Committed | 28,900,000 | $ 28,900,000 |  |  |
Non-cancelable Purchase Commitment Term |  | 100 days |  |  |
Purchase Commitment for Equipment [Member] |  |  |  |  |
Purchase Commitment, Remaining Minimum Amount Committed | $ 15,500,000 | $ 15,500,000 |  |  |
Subsequent Event [Member] | Leased Facility in Houston, Texas [Member] |  |  |  |  |
Lease Purchase Option Exercised |  |  |  |  | $ 4,900,000
Cost of Sales [Member] |  |  |  |  |
Insurance Recoveries |  |  |  | 244,000 |
Selling, General and Administrative Expenses [Member] |  |  |  |  |
Insurance Recoveries |  |  |  | 69,000 |
Other Expense [Member] |  |  |  |  |
CustomerDisputes |  |  |  | $ 700,000 |
Texas, Florida [Member] |  |  |  |  |
Number of Facilities Affected by Hurricanes | 4 |  |  |  |

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