LOSS PER COMMON SHARE (Tables)

12 Months Ended

Sep. 30, 2025

Earnings Per Share [Abstract]

Reconciliations between net (loss) earnings attributable to stockholders and common shares outstanding of the basic and diluted net (loss) earnings per share computations

Reconciliations between net loss attributable to Barnwell stockholders and common shares outstanding of the basic and diluted net loss per share computations are detailed in the following tables:

	Year ended September 30,
	2025		2024
Numerator:
Net loss from continuing operations	$	(7,123,000)	$	(3,871,000)
Less: Net (loss) earnings attributable to non-controlling interests of continuing operations	(8,000)		234,000
Net loss from continuing operations attributable to Barnwell Industries, Inc.	(7,115,000)		(4,105,000)
Net earnings (loss) from discontinued operations	12,000		(1,460,000)
Net loss attributable to Barnwell Industries, Inc.	$	(7,103,000)	$	(5,565,000)
Denominator:
Basic weighted-average number of common shares outstanding	10,056,479		10,017,997
Effect of dilutive securities - common stock options and restricted stock units	—		—
Diluted weighted-average number of common shares outstanding	10,056,479		10,017,997
Basic and diluted loss per common share:
Net loss per common share from continuing operations attributable to Barnwell Industries, Inc. stockholders	$	(0.71)	$	(0.41)
Net loss per common share from discontinued operations	—		(0.15)
Net loss per common share attributable to Barnwell Industries, Inc. stockholders	$	(0.71)	$	(0.56)