CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Revenues	$ 18,347	$ 12,075
Costs and expenses:
General and administrative	5,820	5,524
Depletion, depreciation, and amortization	2,147	3,022
Impairment of assets	4,376	5,710
Interest expense	3	5
Gain on sale of asset	(1,336)	0
Total costs and expenses	23,373	24,447
Loss before equity in income (loss) of affiliates and income taxes	(5,026)	(12,372)
Equity in income (loss) of affiliates	352	(276)
Loss before income taxes	(4,674)	(12,648)
Income tax provision (benefit)	3	(231)
Net loss	(4,677)	(12,417)
Less: Net earnings (loss) attributable to non-controlling interests	79	(3)
Net loss attributable to Barnwell Industries, Inc. stockholders	$ (4,756)	$ (12,414)
Basic net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ (0.57)	$ (1.50)
Diluted net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ (0.57)	$ (1.50)
Weighted-average number of common shares outstanding:
Basic (in shares)	8,277,160	8,277,160
Diluted (in shares)	8,277,160	8,277,160
Oil and natural gas
Revenues:
Revenues	$ 6,693	$ 6,406
Costs and expenses:
Costs and expenses	4,850	5,213
Depletion, depreciation, and amortization	1,747	2,680
Impairment of assets	4,326	5,710
Contract drilling
Revenues:
Revenues	10,994	5,349
Costs and expenses:
Costs and expenses	7,513	4,973
Depletion, depreciation, and amortization	356	287
Sale of interest in leasehold land
Revenues:
Revenues	325	165
Costs and expenses:
Impairment of assets	50	0
Gas processing and other
Revenues:
Revenues	335	155
Costs and expenses:
Depletion, depreciation, and amortization	$ 44	$ 55