(LOSS) EARNINGS PER COMMON SHARE (Tables)

6 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

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

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

	Three months ended March 31, 2023
	Net Loss (Numerator)		Shares (Denominator)	Per-Share Amount
Basic net loss per share	$	(1,237,000)	9,956,687	$	(0.12)
Effect of dilutive securities -
common stock options	—		—
Diluted net loss per share	$	(1,237,000)	9,956,687	$	(0.12)

	Six months ended March 31, 2023
	Net Loss (Numerator)		Shares (Denominator)	Per-Share Amount
Basic net loss per share	$	(148,000)	9,956,687	$	(0.01)
Effect of dilutive securities -
common stock options	—		—
Diluted net loss per share	$	(148,000)	9,956,687	$	(0.01)

	Three months ended March 31, 2022
	Net Earnings (Numerator)		Shares (Denominator)	Per-Share Amount
Basic net earnings per share	$	2,052,000	9,570,989	$	0.21
Effect of dilutive securities -
common stock options	—		—
Diluted net earnings per share	$	2,052,000	9,570,989	$	0.21

	Six months ended March 31, 2022
	Net Earnings (Numerator)		Shares (Denominator)	Per-Share Amount
Basic net earnings per share	$	3,125,000	9,507,955	$	0.33
Effect of dilutive securities -
common stock options	—		—
Diluted net earnings per share	$	3,125,000	9,507,955	$	0.33