CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Revenues	$ 2,595	$ 1,856
Costs and expenses:
Oil and natural gas operating	1,337	658
Contract drilling operating	1,316	821
General and administrative	1,548	1,481
Depletion, depreciation, and amortization	819	280
Impairment of assets	2,170	0
Interest expense	4	0
Total costs and expenses	7,194	3,240
Loss before equity in loss of affiliates and income taxes	(4,599)	(1,384)
Equity in loss of affiliates	(79)	(153)
Loss before income taxes	(4,678)	(1,537)
Income tax benefit	(105)	(503)
Net loss	(4,573)	(1,034)
Less: Net earnings (loss) attributable to non-controlling interests	27	(17)
Net loss attributable to Barnwell Industries, Inc.	$ (4,600)	$ (1,017)
Basic and diluted net loss per common share attributable to Barnwell Industries, Inc. stockholders (in dollars per share)	$ (0.56)	$ (0.12)
Weighted-average number of common shares outstanding:
Basic and diluted (in shares)	8,277	8,277
Oil and natural gas
Revenues:
Revenues	$ 1,232	$ 953
Costs and expenses:
Depletion, depreciation, and amortization	749	199
Impairment of assets	2,170	0
Contract drilling
Revenues:
Revenues	1,163	842
Costs and expenses:
Depletion, depreciation, and amortization	57	61
Land investment
Revenues:
Revenues	165	0
Gas processing and other
Revenues:
Revenues	35	61
Costs and expenses:
Depletion, depreciation, and amortization	$ 13	$ 20