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Note 5 - Restructuring - Restructuring Activity (Details) - USD ($)	12 Months Ended
	Oct. 01, 2022	Oct. 02, 2021
Liability as of October 2, 2021	$ 10,000	$ 171,000
Restructuring charges (recoveries), net	(318,000)	2,868,000
Cash payments	(314,000)	(1,614,000)
Non-cash charges	622,000	(1,415,000)
Restructuring Reserve, Non-cash Charges	622,000	(1,415,000)
Liability as of October 1, 2022	0	10,000
Employee Severance [Member]
Liability as of October 2, 2021	0	0
Restructuring charges (recoveries), net	0	13,000
Cash payments	0	(13,000)
Non-cash charges	0	0
Restructuring Reserve, Non-cash Charges	0	0
Liability as of October 1, 2022	0	0
Equipment Relocation [Member]
Liability as of October 2, 2021	0	20,000
Restructuring charges (recoveries), net	0	423,000
Cash payments	0	(443,000)
Non-cash charges	0	0
Restructuring Reserve, Non-cash Charges	0	0
Liability as of October 1, 2022	0	0
Facility Closing [Member]
Liability as of October 2, 2021	10,000	151,000
Restructuring charges (recoveries), net	304,000	1,017,000
Cash payments	(314,000)	(1,158,000)
Non-cash charges	0	0
Restructuring Reserve, Non-cash Charges	0	0
Liability as of October 1, 2022	0	10,000
Asset Impairments [Member]
Liability as of October 2, 2021	0	0
Restructuring charges (recoveries), net	0	1,415,000
Cash payments	0	0
Non-cash charges	0	(1,415,000)
Restructuring Reserve, Non-cash Charges	0	(1,415,000)
Liability as of October 1, 2022	0	0
Gain on Sale of Property and Equipment [Member]
Liability as of October 2, 2021	0	0
Restructuring charges (recoveries), net	(622,000)	0
Cash payments	0	0
Non-cash charges	622,000	0
Restructuring Reserve, Non-cash Charges	622,000	0
Liability as of October 1, 2022	$ 0	$ 0

X

- Definition

Amount of increase (decrease) in the reserve for full or partial settlement through consideration other than cash.

+ 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/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482017/420-10-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 17
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-17

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X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482047/420-10-45-3

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479823/420-10-S99-1

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X

- 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/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482017/420-10-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2

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