CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues:
Revenue	$ 3,192	$ 4,506	$ 10,695	$ 14,346
Costs and expenses:
General and administrative	1,868	1,303	5,193	3,879
Depletion, depreciation, and amortization	844	1,294	2,502	4,095
Impairment of assets	200	599	865	2,276
Foreign currency (gain) loss	(219)	61	122	63
Interest expense	4	0	5	0
Total costs and expenses	4,779	5,491	15,251	17,668
Loss from continuing operations before equity in income of affiliates and income taxes	(1,587)	(985)	(4,556)	(3,322)
Equity in income of affiliates	0	0	0	1,071
Loss from continuing operations before income taxes	(1,587)	(985)	(4,556)	(2,251)
Income tax (benefit) provision	(34)	21	135	187
Net loss from continuing operations	(1,553)	(1,006)	(4,691)	(2,438)
Net (loss) earnings from discontinued operations	0	(228)	12	(1,008)
Net loss	(1,553)	(1,234)	(4,679)	(3,446)
Less: Net (loss) earnings attributable to non-controlling interests	(3)	12	(5)	236
Net loss attributable to Barnwell Industries, Inc.	$ (1,550)	$ (1,246)	$ (4,674)	$ (3,682)
Basic and diluted loss per common share attributable to Barnwell Industries, Inc. stockholders:
Basic net loss per common share from continuing operations attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ (0.15)	$ (0.10)	$ (0.47)	$ (0.27)
Diluted net loss per common share from continuing operations attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	(0.15)	(0.10)	(0.47)	(0.27)
Basic net loss per common share from discontinued operations (in dollars per share)	0	(0.02)	0	(0.10)
Diluted net loss per common share from discontinued operations (in dollars per share)	0	(0.02)	0	(0.10)
Basic net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	(0.15)	(0.12)	(0.47)	(0.37)
Diluted net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ (0.15)	$ (0.12)	$ (0.47)	$ (0.37)
Weighted-average number of common shares outstanding:
Basic (in shares)	10,053,534	10,028,090	10,051,390	10,014,609
Diluted (in shares)	10,053,534	10,028,090	10,051,390	10,014,609
Oil and natural gas
Revenues:
Revenue	$ 3,153	$ 4,452	$ 10,593	$ 13,726
Costs and expenses:
Oil and natural gas operating	2,082	2,234	6,564	7,355
Depletion, depreciation, and amortization	844	1,293	2,501	4,093
Impairment of assets	200	599	865	2,276
Sale of interest in leasehold land
Revenues:
Revenue	0	0	0	500
Gas processing and other
Revenues:
Revenue	39	54	102	120
Costs and expenses:
Depletion, depreciation, and amortization	$ 0	$ 1	$ 1	$ 2