CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Revenues:
Revenues	$ 2,963	$ 1,975	$ 5,558	$ 3,831
Costs and expenses:
Oil and natural gas operating	1,249	575	2,586	1,233
Contract drilling operating	1,231	883	2,547	1,704
General and administrative	1,461	1,563	3,009	3,044
Depletion, depreciation, and amortization	758	227	1,577	507
Impairment of assets	243	37	2,413	37
Interest expense	0	0	4	0
Gain on sales of assets	0	(2,250)	0	(2,250)
Total costs and expenses	4,942	1,035	12,136	4,275
(Loss) earnings before equity in loss of affiliates and income taxes	(1,979)	940	(6,578)	(444)
Equity in loss of affiliates	(207)	(80)	(286)	(233)
Loss (earnings) before income taxes	(2,186)	860	(6,864)	(677)
Income tax (benefit) provision	(35)	197	(140)	(306)
Net (loss) earnings	(2,151)	663	(6,724)	(371)
Less: Net (loss) earnings attributable to non-controlling interests	(26)	(16)	1	(33)
Net (loss) earnings attributable to Barnwell Industries, Inc.	$ (2,125)	$ 679	$ (6,725)	$ (338)
Basic and diluted net (loss) earnings per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ (0.26)	$ 0.08	$ (0.81)	$ (0.04)
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	$ 1,924	$ 859	$ 3,156	$ 1,812
Costs and expenses:
Depletion, depreciation, and amortization	684	157	1,433	356
Impairment of assets	243	0	2,413	0
Contract drilling
Revenues:
Revenues	987	1,016	2,150	1,858
Costs and expenses:
Depletion, depreciation, and amortization	60	53	117	114
Land investment
Revenues:
Revenues	0	0	165	0
Costs and expenses:
Impairment of assets	0	37	0
Gas processing and other
Revenues:
Revenues	52	100	87	161
Costs and expenses:
Depletion, depreciation, and amortization	$ 14	$ 17	$ 27	$ 37