CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Revenues:
Revenue	$ 2,746	$ 3,934
Costs and expenses:
General and administrative	1,616	1,163
Depletion, depreciation, and amortization	592	904
Impairment of assets	0	613
Foreign currency (gain) loss	(47)	351
Total costs and expenses	4,232	5,527
Loss from continuing operations before income taxes	(1,486)	(1,593)
Income tax (benefit) provision	(74)	7
Net loss from continuing operations	(1,412)	(1,600)
Net (loss) from discontinued operations	0	(319)
Net loss	(1,412)	(1,919)
Less: Net earnings (loss) attributable to non-controlling interests	14	(2)
Net loss attributable to Barnwell Industries, Inc.	$ (1,426)	$ (1,917)
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)	$ (0.13)	$ (0.16)
Diluted net loss per common share from continuing operations attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	(0.13)	(0.16)
Basic net loss per common share from discontinued operations (in dollars per share)	0	(0.03)
Diluted net loss per common share from discontinued operations (in dollars per share)	0	(0.03)
Basic net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	(0.13)	(0.19)
Diluted net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ (0.13)	$ (0.19)
Weighted-average number of common shares outstanding:
Basic (in shares)	11,070,498	10,047,173
Diluted (in shares)	11,070,498	10,047,173
Oil and natural gas
Revenues:
Revenue	$ 2,630	$ 3,897
Costs and expenses:
Oil and natural gas operating	2,071	2,496
Depletion, depreciation, and amortization	591	904
Impairment of assets	0	613
Sale of interest in leasehold land
Revenues:
Revenue	70	0
Gas processing and other
Revenues:
Revenue	46	37
Costs and expenses:
Depletion, depreciation, and amortization	$ 1	$ 0