GOODWILL AND INTANGIBLE ASSETS (Net intangible assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 27, 2014	Sep. 27, 2014
Finite-Lived Intangible Assets [Line Items]
Net intangible assets	$ 4,562	$ 5,891
Wedge bonder developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	33,200	33,200
Accumulated amortization	(29,644)	(28,458)
Net intangible assets	3,556	4,742
Average estimated useful lives (in years)	7 years
Wedge bonder customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	19,300	19,300
Accumulated amortization	(19,300)	(19,300)
Net intangible assets	0	0
Average estimated useful lives (in years)	5 years
Wedge bonder trade name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	4,600	4,600
Accumulated amortization	(3,594)	(3,451)
Net intangible assets	1,006	1,149
Average estimated useful lives (in years)	8 years
Wedge bonder other intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets	2,500	2,500
Accumulated amortization	(2,500)	(2,500)
Net intangible assets	$ 0	$ 0
Average estimated useful lives (in years)	1 year 10 months 24 days

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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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.

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph ((a)(1),(b))

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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