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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Reserve for product warranty activity) (Details) (USD $) | 3 Months Ended | 6 Months Ended
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Mar. 28, 2015 | Mar. 29, 2014 | Mar. 28, 2015 | Mar. 29, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] |  |  |  |
Reserve for product warranty, beginning of period | $ 1,215,000 us-gaap_ProductWarrantyAccrual | $ 887,000 us-gaap_ProductWarrantyAccrual | $ 1,542,000 us-gaap_ProductWarrantyAccrual | $ 1,194,000 us-gaap_ProductWarrantyAccrual
Acquisition of business | 547,000 us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition | 0 us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition | 547,000 us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition | 0 us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition
Provision for product warranty | 1,038,000 us-gaap_ProductWarrantyAccrualWarrantiesIssued | 352,000 us-gaap_ProductWarrantyAccrualWarrantiesIssued | 1,237,000 us-gaap_ProductWarrantyAccrualWarrantiesIssued | 500,000 us-gaap_ProductWarrantyAccrualWarrantiesIssued
Product warranty costs paid | (951,000)us-gaap_ProductWarrantyAccrualPayments | (354,000)us-gaap_ProductWarrantyAccrualPayments | (1,477,000)us-gaap_ProductWarrantyAccrualPayments | (809,000)us-gaap_ProductWarrantyAccrualPayments
Reserve for product warranty, end of period | $ 1,849,000 us-gaap_ProductWarrantyAccrual | $ 885,000 us-gaap_ProductWarrantyAccrual | $ 1,849,000 us-gaap_ProductWarrantyAccrual | $ 885,000 us-gaap_ProductWarrantyAccrual

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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 5 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(5)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(2)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(3)) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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- Definition Liability for a standard product warranty acquired in a business acquisition. Does not include any liability for an extended warranty acquired in a business acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249 + Details
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