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Note 17 - Commitments and Contingent Liabilities (Details Textual) - USD ($)	12 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 30, 2018
Restructuring Charges, Total	$ 13,751,000	$ 11,635,000	$ 5,550,000
Restructuring Reserve, Ending Balance	0	$ 0
Impact of Withdrawal from Retirement Plans [Member]
Restructuring Charges, Total	4,400,000
Employee Severance [Member]
Restructuring Charges, Total	6,272,000
Transition Costs Related to the Transactions [Member]
Restructuring Charges, Total	1,807,000
Other Restructuring [Member]
Restructuring Charges, Total	$ 1,272,808
Minimum [Member]
Multiemployer Plans, Withdrawal Obligation, Period (Year)	20 years
Plan Partially Withdrawn From in 2017 [Member] | Minimum [Member]
Multiemployer Plans, Withdrawal Obligation, Period (Year)	20 years
Construction and Equipment Purchase Commitments [Member]
Construction and Equipment, Purchase Commitments	$ 2,050,000

X

- Definition

Represents purchase commitments for construction and equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	lee_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The period of time in which an obligation recognized by withdrawing from a pension or postretirement benefit plan will be paid.

+ References

No definition available.

+ Details

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Namespace Prefix:	lee_
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Balance Type:	na
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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 5.P.3)
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747

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

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-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=115931487&loc=d3e140904-122747

+ Details

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Period Type:	duration

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
-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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

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- Details

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- Details

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- Details

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- Details

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X

- Details

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