SEGMENT INFORMATION (Details)	3 Months Ended		9 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) segment	Jun. 30, 2024 USD ($)
Segment information
Number of reportable segments | segment			2
Number of operating segments | segment			2
Revenues:
Revenue before interest income	$ 3,178,000	$ 4,485,000	$ 10,651,000	$ 14,292,000
Interest income	14,000	21,000	44,000	54,000
Total revenues	3,192,000	4,506,000	10,695,000	14,346,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	844,000	1,294,000	2,502,000	4,095,000
Impairment:
Impairment of assets	200,000	599,000	865,000	2,276,000
Operating profit (before general and administrative expenses):
Operating profit (before general and administrative expenses)	52,000	358,000	720,000	566,000
Equity in income of affiliates:
Equity in income of affiliates	0	0	0	1,071,000
General and administrative expenses	(1,868,000)	(1,303,000)	(5,193,000)	(3,879,000)
Foreign currency gain (loss)	219,000	(61,000)	(122,000)	(63,000)
Interest expense	(4,000)	0	(5,000)	0
Interest income	14,000	21,000	44,000	54,000
Loss from continuing operations before income taxes	(1,587,000)	(985,000)	(4,556,000)	(2,251,000)
Intersegment eliminations | External Customer
Revenues:
Total revenues			0
Oil and natural gas
Revenues:
Revenue before interest income	3,153,000	4,452,000	10,593,000	13,726,000
Total revenues	3,153,000	4,452,000	10,593,000	13,726,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	844,000	1,293,000	2,501,000	4,093,000
Impairment:
Impairment of assets	200,000	599,000	865,000	2,276,000
Operating profit (before general and administrative expenses):
Operating profit (before general and administrative expenses)	27,000	326,000	663,000	2,000
Land investment
Revenues:
Revenue before interest income	0	0	0	500,000
Total revenues	0	0	0	500,000
Operating profit (before general and administrative expenses):
Operating profit (before general and administrative expenses)	0	0	0	500,000
Other
Revenues:
Revenue before interest income	25,000	33,000	58,000	66,000
Total revenues	39,000	54,000	102,000	120,000
Depletion, depreciation, and amortization:
Depletion, depreciation, and amortization	0	1,000	1,000	2,000
Operating profit (before general and administrative expenses):
Operating profit (before general and administrative expenses)	$ 25,000	$ 32,000	$ 57,000	$ 64,000