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SEGMENT INFORMATION (Capital expenditures and depreciation expense by segment) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jan. 02, 2016 | Dec. 27, 2014
Capital expenditures: |  |
Property, Plant and Equipment, Additions | $ 1,394 | $ 2,253
Depreciation expense: |  |
Depreciation expense | 2,385 | 2,227
Equipment [Member] |  |
Capital expenditures: |  |
Property, Plant and Equipment, Additions | 1,071 | 1,736
Depreciation expense: |  |
Depreciation expense | 1,806 | 1,585
Expendable Tools [Member] |  |
Capital expenditures: |  |
Property, Plant and Equipment, Additions | 323 | 517
Depreciation expense: |  |
Depreciation expense | $ 579 | $ 642

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- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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- Definition Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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Period Type: | duration

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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Period Type: |