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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Reserve for product warranty activity) (Details) (USD $)	3 Months Ended		6 Months Ended
	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	$ 1,215,000us-gaap_ProductWarrantyAccrual	$ 887,000us-gaap_ProductWarrantyAccrual	$ 1,542,000us-gaap_ProductWarrantyAccrual	$ 1,194,000us-gaap_ProductWarrantyAccrual
Acquisition of business	547,000us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition	0us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition	547,000us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition	0us-gaap_StandardProductWarrantyAccrualAdditionsFromBusinessAcquisition
Provision for product warranty	1,038,000us-gaap_ProductWarrantyAccrualWarrantiesIssued	352,000us-gaap_ProductWarrantyAccrualWarrantiesIssued	1,237,000us-gaap_ProductWarrantyAccrualWarrantiesIssued	500,000us-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	$ 1,849,000us-gaap_ProductWarrantyAccrual	$ 885,000us-gaap_ProductWarrantyAccrual	$ 1,849,000us-gaap_ProductWarrantyAccrual	$ 885,000us-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

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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

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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

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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

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