CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 2,202	$ (1,316)
Other comprehensive income (loss):
Foreign currency translation adjustments, net of taxes of $0	(70)	(156)
Retirement plans - amortization of accumulated other comprehensive loss into net periodic benefit cost, net of taxes of $0	97	39
Total other comprehensive income (loss)	27	(117)
Total comprehensive income (loss)	2,229	(1,433)
Less: Comprehensive income attributable to non-controlling interests	561	93
Comprehensive income (loss) attributable to Barnwell Industries, Inc.	$ 1,668	$ (1,526)