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Note 4 - Restructuring Charges and Acquisition Costs - Summary of Restructuring Activities and Associated Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015
Liability, beginning of period | $ 270 | $ 735 | $ 1,208
Restructuring charges (recoveries) | 164 | 115 | 349
Cash payments | (434) | (740) | (1,174)
Non-cash charges |  | 160 | 352
Liability, end of period |  | 270 | 735
Asset Impairment Charges [Member] |  |  |
Liability, beginning of period |  |  |
Restructuring charges (recoveries) |  | 20 | 543
Cash payments |  |  |
Non-cash charges |  | (20) | (543)
Liability, end of period |  |  |
Equipment Relocation Costs [Member] |  |  |
Liability, beginning of period | 31 |  |
Restructuring charges (recoveries) | 164 | 186 | 79
Cash payments | (195) | (155) | (79)
Non-cash charges |  |  |
Liability, end of period |  | 31 |
Employee Severance [Member] |  |  |
Liability, beginning of period | 239 | 735 | 1,208
Restructuring charges (recoveries) |  |  | 75
Cash payments | (239) | (496) | (548)
Non-cash charges |  |  |
Liability, end of period |  | 239 | 735
Facility Closing [Member] |  |  |
Liability, beginning of period |  |  |
Restructuring charges (recoveries) |  | 89 | 547
Cash payments |  | (89) | (547)
Non-cash charges |  |  |
Liability, end of period |  |  |
Gain on Sale of Property and Equipment [Member] |  |  |
Liability, beginning of period |  |  |
Restructuring charges (recoveries) |  | (180) | (895)
Cash payments |  |  |
Non-cash charges |  | 180 | 895
Liability, end of period |  |  |

X
- Definition Amount of expenses (recoveries) associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses (recoveries) related to a discontinued operation or an asset retirement obligation. + References No definition available. + Details
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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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