SEGMENT INFORMATION (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Revenues:
Revenue before interest income	$ 3,565,000	$ 4,660,000	$ 7,473,000	$ 9,807,000
Interest income	4,000	18,000	30,000	33,000
Total revenues	3,569,000	4,678,000	7,503,000	9,840,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	754,000	1,342,000	1,658,000	2,801,000
Impairment:
Impairment of assets	52,000	1,677,000	665,000	1,677,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss) (before general and administrative expenses)	773,000	(689,000)	668,000	208,000
Equity in income of affiliates:
Equity in income of affiliates	0	1,071,000	0	1,071,000
General and administrative expenses	(2,162,000)	(1,256,000)	(3,325,000)	(2,576,000)
Foreign currency gain (loss)	10,000	(128,000)	(341,000)	(2,000)
Interest expense	(1,000)	0	(1,000)	0
Interest income	4,000	18,000	30,000	33,000
Loss from continuing operations before income taxes	(1,376,000)	(984,000)	(2,969,000)	(1,266,000)
Intersegment eliminations | External Customer
Revenues:
Total revenues			0
Oil and natural gas
Revenues:
Revenue before interest income	3,543,000	4,144,000	7,440,000	9,274,000
Total revenues	3,543,000	4,144,000	7,440,000	9,274,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	753,000	1,342,000	1,657,000	2,800,000
Impairment:
Impairment of assets	52,000	1,677,000	665,000	1,677,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss) (before general and administrative expenses)	752,000	(1,205,000)	636,000	(324,000)
Land investment
Revenues:
Revenue before interest income	0	500,000	0	500,000
Total revenues	0	500,000	0	500,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss) (before general and administrative expenses)	0	500,000	0	500,000
Other
Revenues:
Revenue before interest income	22,000	16,000	33,000	33,000
Total revenues	26,000	34,000	63,000	66,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	1,000	0	1,000	1,000
Operating profit (loss) (before general and administrative expenses):
Operating profit (loss) (before general and administrative expenses)	$ 21,000	$ 16,000	$ 32,000	$ 32,000