CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Revenues	$ 18,113	$ 18,347
Costs and expenses:
General and administrative	7,088	5,820
Depletion, depreciation, and amortization	963	2,147
Impairment of assets	668	4,376
Interest expense	13	3
Gain on debt extinguishment	(149)	0
Gain on termination of post-retirement medical plan	(2,341)	0
Gain on sale of assets	(1,982)	(1,336)
Total costs and expenses	16,371	23,373
Earnings (loss) before equity in income of affiliates and income taxes	1,742	(5,026)
Equity in income of affiliates	5,793	352
Earnings (loss) before income taxes	7,535	(4,674)
Income tax provision	332	3
Net earnings (loss)	7,203	(4,677)
Less: Net earnings attributable to non-controlling interests	950	79
Net earnings (loss) attributable to Barnwell Industries, Inc. stockholders	$ 6,253	$ (4,756)
Basic net earnings (loss) per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ 0.73	$ (0.57)
Diluted net earnings (loss) per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ 0.73	$ (0.57)
Weighted-average number of common shares outstanding:
Basic (in shares)	8,592,154	8,277,160
Diluted (in shares)	8,592,154	8,277,160
Oil and natural gas
Revenues:
Revenues	$ 10,254	$ 6,693
Costs and expenses:
Costs and expenses	6,556	4,850
Depletion, depreciation, and amortization	645	1,747
Impairment of assets	630	4,326
Contract drilling
Revenues:
Revenues	5,809	10,994
Costs and expenses:
Costs and expenses	5,555	7,513
Depletion, depreciation, and amortization	305	356
Impairment of assets	38	0
Sale of interest in leasehold land
Revenues:
Revenues	1,738	325
Costs and expenses:
Impairment of assets	0	50
Gas processing and other
Revenues:
Revenues	312	335
Costs and expenses:
Depletion, depreciation, and amortization	$ 13	$ 44