Note 9 - Plant Restructuring - Restructuring Reserve (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Oct. 02, 2021	Jul. 03, 2021	Sep. 26, 2020	Jun. 27, 2020	Oct. 02, 2021	Sep. 26, 2020
Balance		$ 0		$ 202	$ 0	$ 202
Charge to expense	$ 47	66	$ 24	263
Cash payments/write offs					(113)	(459)
Balance	0		30		0	30
Employee Severance [Member]
Balance		0		202	0	202
Charge to expense	0	0	8	219
Cash payments/write offs					0	(399)
Balance	0		30		0	30
Other Restructuring [Member]
Balance		0		0	0	0
Charge to expense	47	$ 66	16	$ 44
Cash payments/write offs					(113)	(60)
Balance	$ 0		$ 0		$ 0	$ 0

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b)(2))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

Name:	us-gaap_RestructuringReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant