CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) NCOME - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (662)	$ 1,209
Other comprehensive income (loss):
Foreign currency translation adjustments, net of taxes of $0	30	2
Retirement plans:
Amortization of accumulated other comprehensive gain into net periodic benefit cost, net of taxes of $0	(21)	(20)
Total other comprehensive income (loss)	9	(18)
Total comprehensive (loss) income	(653)	1,191
Less: Comprehensive income attributable to non-controlling interests	(2)	(120)
Comprehensive (loss) income attributable to Barnwell Industries, Inc.	$ (655)	$ 1,071