SUPPLEMENTARY OIL AND NATURAL GAS INFORMATION (UNAUDITED) - STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow after Discount [Abstract]
Future cash inflows	$ 48,624	$ 87,336
Future production costs	(30,967)	(47,681)
Future development costs	(50)	(2,795)
Future income tax expenses	(972)	(2,827)
Future net cash flows excluding abandonment, decommissioning and reclamation	16,635	34,033
Future abandonment, decommissioning and reclamation	(18,007)	(18,076)
Future net cash flows	(1,372)	15,957
10% annual discount for timing of cash flows	8,042	(107)
Standardized measure of discounted future net cash flows	6,670	15,850	$ 19,913
Canada
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow after Discount [Abstract]
Future cash inflows	48,624	75,293
Future production costs	(30,967)	(42,601)
Future development costs	(50)	(2,795)
Future income tax expenses	(972)	(2,666)
Future net cash flows excluding abandonment, decommissioning and reclamation	16,635	27,231
Future abandonment, decommissioning and reclamation	(18,007)	(18,026)
Future net cash flows	(1,372)	9,205
10% annual discount for timing of cash flows	8,042	2,697
Standardized measure of discounted future net cash flows	6,670	11,902
United States
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow after Discount [Abstract]
Future cash inflows	0	12,043
Future production costs	0	(5,080)
Future development costs	0	0
Future income tax expenses	0	(161)
Future net cash flows excluding abandonment, decommissioning and reclamation	0	6,802
Future abandonment, decommissioning and reclamation	0	(50)
Future net cash flows	0	6,752
10% annual discount for timing of cash flows	0	(2,804)
Standardized measure of discounted future net cash flows	$ 0	$ 3,948