CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,234)	$ (715)	$ (3,446)	$ (741)
Other comprehensive (loss) income:
Foreign currency translation adjustments, net of taxes of $0	12	15	20	17
Retirement plans:
Amortization of accumulated other comprehensive gain into net periodic benefit cost, net of taxes of $0	(21)	(20)	(64)	(60)
Total other comprehensive loss	(9)	(5)	(44)	(43)
Total comprehensive loss	(1,243)	(720)	(3,490)	(784)
Less: Comprehensive income attributable to non-controlling interests	(12)	(2)	(236)	(124)
Comprehensive loss attributable to Barnwell Industries, Inc.	$ (1,255)	$ (722)	$ (3,726)	$ (908)