CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,919)	$ (662)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of taxes of $0	93	30
Retirement plans:
Amortization of accumulated other comprehensive gain into net periodic benefit cost, net of taxes of $0	0	(21)
Total other comprehensive income	93	9
Total comprehensive loss	(1,826)	(653)
Less: Comprehensive loss (income) attributable to non-controlling interests	2	(2)
Comprehensive loss attributable to Barnwell Industries, Inc.	$ (1,824)	$ (655)