CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Revenues	$ 4,387	$ 4,850
Costs and expenses:
General and administrative	1,185	1,496
Depletion, depreciation, and amortization	276	705
Impairment of assets	630	0
Interest expense	1	0
Total costs and expenses	4,635	5,228
Loss before equity in income (loss) of affiliates and income taxes	(248)	(378)
Equity in income (loss) of affiliates	1,054	(43)
Earnings (loss) before income taxes	806	(421)
Income tax provision (benefit)	63	(2)
Net earnings (loss)	743	(419)
Less: Net earnings (loss) attributable to non-controlling interests	159	(5)
Net earnings (loss) attributable to Barnwell Industries, Inc.	$ 584	$ (414)
Basic and diluted net earnings (loss) per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ 0.07	$ (0.05)
Weighted-average number of common shares outstanding:
Basic and diluted (in shares)	8,277,160	8,277,160
Oil and natural gas
Revenues:
Revenues	$ 1,887	$ 2,141
Costs and expenses:
Costs and expenses	1,435	1,213
Depletion, depreciation, and amortization	195	606
Impairment of assets	630	0
Contract drilling
Revenues:
Revenues	1,942	2,646
Costs and expenses:
Costs and expenses	1,108	1,814
Depletion, depreciation, and amortization	76	85
Land investment
Revenues:
Revenues	485	0
Gas processing and other
Revenues:
Revenues	73	63
Costs and expenses:
Depletion, depreciation, and amortization	$ 5	$ 14