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Note 3 - Business Combination - Restructuring Activity (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Apr. 03, 2021	Jan. 02, 2021	Mar. 28, 2020	Apr. 03, 2021	Mar. 28, 2020
Liability beginning balance	$ 47	$ 171		$ 171
Restructuring charges	545	657	$ 149	1,202	$ 149
Cash payments	(565)	(777)			(4)
Non-cash charges	0	(4)
Liability ending balance	27	47	145	27	145
Employee Severance [Member]
Liability beginning balance	0	0		0
Restructuring charges	0	13			129
Cash payments	0	(13)			(4)
Non-cash charges	0	0
Liability ending balance	0	0	125	0	125
Equipment Relocation [Member]
Liability beginning balance	13	20		20
Restructuring charges	286	88			0
Cash payments	(299)	(95)			0
Non-cash charges		0
Liability ending balance	0	13	0	0	0
Facility Closing [Member]
Liability beginning balance	34	151		151
Restructuring charges	259	552			20
Cash payments	(266)	(669)			0
Non-cash charges		0
Liability ending balance	27	34	20	27	20
Asset Impairments [Member]
Liability beginning balance	0	0		0
Restructuring charges	0	4			0
Cash payments	0	0			0
Non-cash charges	0	(4)
Liability ending balance	$ 0	$ 0	$ 0	$ 0	$ 0

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
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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

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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://fasb.org/us-gaap/role/ref/legacyRef
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X

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

+ References

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