CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,340	$ 743
Other comprehensive (loss) income:
Foreign currency translation adjustments, net of taxes of $0	(25)	(234)
Retirement plans:
Amortization of accumulated other comprehensive loss into net periodic benefit cost, net of taxes of $0	0	33
Total other comprehensive loss	(25)	(201)
Total comprehensive income	1,315	542
Less: Comprehensive income attributable to non-controlling interests	(267)	(159)
Comprehensive income attributable to Barnwell Industries, Inc.	$ 1,048	$ 383