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Note 6 - Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 29, 2018 | Sep. 30, 2017
Gross | $ 14,697 | $ 11,877
Accumulated Amortization | (4,994) | (3,964)
Net Book Value | $ 9,703 | $ 7,913
Customer Relationships [Member] |  |
Weighted-Average Useful Life (Year) | 16 years 328 days | 20 years
Gross | $ 9,070 | $ 6,500
Accumulated Amortization | (1,598) | (1,018)
Net Book Value | $ 7,472 | $ 5,482
Technology-Based Intangible Assets [Member] |  |
Weighted-Average Useful Life (Year) | 20 years | 20 years
Gross | $ 1,800 | $ 1,800
Accumulated Amortization | (371) | (283)
Net Book Value | $ 1,429 | $ 1,517
Noncompete Agreements [Member] |  |
Weighted-Average Useful Life (Year) | 5 years | 4 years 292 days
Gross | $ 3,687 | $ 3,577
Accumulated Amortization | (2,994) | (2,663)
Net Book Value | $ 693 | $ 914
Trade Names [Member] |  |
Weighted-Average Useful Life (Year) | 4 years |
Gross | $ 140 |
Accumulated Amortization | (31) |
Net Book Value | $ 109 |

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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