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Note 4 - Restructuring Charges and Acquisition Costs - Summary of Restructuring Activities and Associated Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Liability, beginning of period	$ 270	$ 735	$ 1,208
Restructuring charges (recoveries)	164	115	349
Cash payments	(434)	(740)	(1,174)
Non-cash charges		160	352
Liability, end of period		270	735
Asset Impairment Charges [Member]
Liability, beginning of period
Restructuring charges (recoveries)		20	543
Cash payments
Non-cash charges		(20)	(543)
Liability, end of period
Equipment Relocation Costs [Member]
Liability, beginning of period	31
Restructuring charges (recoveries)	164	186	79
Cash payments	(195)	(155)	(79)
Non-cash charges
Liability, end of period		31
Employee Severance [Member]
Liability, beginning of period	239	735	1,208
Restructuring charges (recoveries)			75
Cash payments	(239)	(496)	(548)
Non-cash charges
Liability, end of period		239	735
Facility Closing [Member]
Liability, beginning of period
Restructuring charges (recoveries)		89	547
Cash payments		(89)	(547)
Non-cash charges
Liability, end of period
Gain on Sale of Property and Equipment [Member]
Liability, beginning of period
Restructuring charges (recoveries)		(180)	(895)
Cash payments
Non-cash charges		180	895
Liability, end of period

X

- Definition

Amount of expenses (recoveries) associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses (recoveries) related to a discontinued operation or an asset retirement obligation.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of non-cash recoveries associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

No definition available.

+ Details

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X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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