CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net (loss) earnings	$ (715)	$ 2,589	$ (741)	$ 6,327
Other comprehensive (loss) income:
Foreign currency translation adjustments, net of taxes of $0	15	(108)	17	(121)
Retirement plans:
Amortization of accumulated other comprehensive gain into net periodic benefit cost, net of taxes of $0	(20)	0	(60)	0
Total other comprehensive loss	(5)	(108)	(43)	(121)
Total comprehensive (loss) income	(720)	2,481	(784)	6,206
Less: Comprehensive income attributable to non-controlling interests	(2)	(58)	(124)	(671)
Comprehensive (loss) income attributable to Barnwell Industries, Inc.	$ (722)	$ 2,423	$ (908)	$ 5,535