Defined Benefit Plan, Plan Assets, Employer, Related Party, Number Of Shares, Ownership Percent

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- Definition

Represents the number of single-family lots sold.

+ References

No definition available.

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- Definition

Revenue from the sale of interest in leasehold land.

+ References

No definition available.

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- Definition

Number of shares of employer stock in which defined benefit plan asset is invested. Includes, but is not limited to, stock issued or managed by related party of employer.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (n)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481687/323-10-50-3

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

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- Definition

Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

+ References

No definition available.

+ Details

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- Definition

Value of stock issued in lieu of cash for services contributed to the entity. Value of the stock issued includes, but is not limited to, services contributed by vendors and founders.

+ References

No definition available.

+ Details

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RELATED PARTY TRANSACTIONS (Details) $ in Thousands		12 Months Ended
RELATED PARTY TRANSACTIONS (Details) $ in Thousands	Sep. 29, 2025 USD ($) shares	Sep. 30, 2025 USD ($) lot Rate shares	Sep. 30, 2024 USD ($) lot shares
Related party transactions
Value of common stock issued for services \| $	$ 177
Pension Plan
Related party transactions
Number of Barnwell common stock held by the Pension Plan (in shares)		666,077	413,148
Mr. Kenneth Grossman
Related party transactions
Issuance of common stock for services (in shares)	65,000
Mr. Joshua Horowitz
Related party transactions
Issuance of common stock for services (in shares)	65,000
Related Party \| Pension Plan
Related party transactions
Percent of common shares owned \| Rate		5.00%
Number of Barnwell common stock held by the Pension Plan (in shares)		666,077
Kaupulehu Developments
Related party transactions
Revenues - sale of interest in leasehold land \| $		$ 0	$ 500
Kaupulehu Developments \| KD Kaupulehu, LLLP \| Increment I
Related party transactions
Number of single family lots sold \| lot		0	2
Revenues - sale of interest in leasehold land \| $			$ 500
KD Acquisition, LLLP
Related party transactions
Ownership interest acquired		19.60%
KD Acquisition II, LP \| Barnwell Industries Inc
Related party transactions
Ownership interest acquired		10.80%