CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (5,331)	$ (811)
Other comprehensive (loss) income:
Foreign currency translation adjustments, net of taxes of $0	0	(2)
Retirement plans:
Amortization of accumulated other comprehensive gain into net periodic benefit cost, net of taxes of $0	(85)	(79)
Net actuarial (loss) gain arising during the period, net of taxes of $0	(76)	891
Total other comprehensive (loss) income	(161)	810
Total comprehensive loss	(5,492)	(1)
Less: Comprehensive income attributable to non-controlling interests	(234)	(150)
Comprehensive loss attributable to Barnwell Industries, Inc.	$ (5,726)	$ (151)