CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues:
Revenues	$ 3,409	$ 3,168	$ 8,967	$ 6,999
Costs and expenses:
General and administrative	1,352	1,591	4,361	4,635
Depletion, depreciation, and amortization	731	187	2,308	694
Impairment of assets	0	165	2,413	202
Interest expense	0	0	4	0
Gain on sales of assets	0	0	0	(2,250)
Total costs and expenses	4,639	3,561	16,775	7,836
Loss before equity in (loss) income of affiliates and income taxes	(1,230)	(393)	(7,808)	(837)
Equity in (loss) income of affiliates	(259)	136	(545)	(97)
Loss before income taxes	(1,489)	(257)	(8,353)	(934)
Income tax benefit	(91)	(163)	(231)	(469)
Net loss	(1,398)	(94)	(8,122)	(465)
Less: Net (loss) earnings attributable to non-controlling interests	(33)	280	(32)	247
Net loss attributable to Barnwell Industries, Inc.	$ (1,365)	$ (374)	$ (8,090)	$ (712)
Basic and diluted net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ (0.16)	$ (0.05)	$ (0.98)	$ (0.09)
Weighted-average number of common shares outstanding:
Basic and diluted (in shares)	8,277	8,277	8,277	8,277
Oil and natural gas
Revenues:
Revenues	$ 1,688	$ 616	$ 4,844	$ 2,428
Costs and expenses:
Costs and expenses	1,314	544	3,900	1,777
Depletion, depreciation, and amortization	639	121	2,072	477
Impairment of assets	0	0	2,413	0
Contract drilling
Revenues:
Revenues	1,689	1,193	3,839	3,051
Costs and expenses:
Costs and expenses	1,242	1,074	3,789	2,778
Depletion, depreciation, and amortization	78	55	195	169
Land investment
Revenues:
Revenues	0	1,310	165	1,310
Costs and expenses:
Impairment of assets	0	0	0	37
Gas processing and other
Revenues:
Revenues	32	49	119	210
Costs and expenses:
Depletion, depreciation, and amortization	14	11	41	48
Impairment of assets	$ 0	$ 165	$ 0	$ 165