SEGMENT AND GEOGRAPHIC INFORMATION (Tables)

12 Months Ended

Sep. 30, 2025

Segment Reporting [Abstract]

Schedule of financial information related to reporting segments

The following table presents certain financial information related to Barnwell’s reporting segments. All revenues reported are from external customers with no intersegment sales or transfers.

	Year ended September 30,
	2025		2024
Revenues:
Oil and natural gas	$	13,563,000	$	17,396,000
Land investment	—		500,000
Other	80,000		91,000
Total before interest income	13,643,000		17,987,000
Interest income	54,000		88,000
Total revenues	$	13,697,000	$	18,075,000
Cost and expenses:
Oil and natural gas	$	8,966,000	$	9,849,000
Depletion, depreciation, and amortization:
Oil and natural gas	$	3,144,000	$	4,947,000
Other	2,000		3,000
Total depletion, depreciation, and amortization	$	3,146,000	$	4,950,000
Impairment:
Oil and natural gas	$	865,000	$	2,885,000
Operating profit (loss) (before general and administrative expenses):
Oil and natural gas	$	588,000	$	(285,000)
Land investment	—		500,000
Other	78,000		88,000
Loss on sale of assets	(636,000)		—
Total operating profit	30,000		303,000
Equity in income of affiliates:
Land investment	—		1,071,000
General and administrative expenses	(6,937,000)		(5,130,000)
Foreign currency (loss) gain	(192,000)		10,000
Interest expense	(7,000)		—
Interest income	54,000		88,000
Loss from continuing operations before income taxes	$	(7,052,000)	$	(3,658,000)

Capital Expenditures:

	Year ended September 30,
	2025		2024
Oil and natural gas	$	254,000	$	4,228,000
Other	—		—
Total	$	254,000	$	4,228,000

    Oil and natural gas capital expenditures include acquisitions as well as changes to capitalized asset retirement obligations, including revisions of asset retirement obligations (see Note 8 for additional details).  

Assets By Segment:

	September 30,
	2025		2024
Oil and natural gas (1)
Canada	$	11,118,000	$	15,218,000
United States	—		4,190,000
Other:
Cash and cash equivalents	2,886,000		4,285,000
Asset for retirement benefits	5,928,000		4,899,000
Corporate and other	880,000		260,000
Total	$	20,812,000	$	28,852,000

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(1)          Primarily located in the province of Alberta, Canada.

Schedule of long-lived assets and revenue by geographic area

Long-Lived Assets By Geographic Area:

	September 30,
	2025		2024
United States	$	5,965,000	$	8,932,000
Canada	9,617,000		12,572,000
Total	$	15,582,000	$	21,504,000

Revenue By Geographic Area:

	Year ended September 30,
	2025		2024
United States	$	1,172,000	$	2,803,000
Canada	12,471,000		15,184,000
Total (before interest income)	$	13,643,000	$	17,987,000