SUPPLEMENTARY OIL AND NATURAL GAS INFORMATION (UNAUDITED) - STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow after Discount [Abstract]
Future cash inflows	$ 87,336	$ 89,424
Future production costs	(47,681)	(46,103)
Future development costs	(2,795)	(2,958)
Future income tax expenses	(2,827)	(1,776)
Future net cash flows excluding abandonment, decommissioning and reclamation	34,033	38,587
Future abandonment, decommissioning and reclamation	(18,076)	(18,627)
Future net cash flows	15,957	19,960
10% annual discount for timing of cash flows	(107)	(47)
Standardized measure of discounted future net cash flows	15,850	19,913	$ 27,878
Canada
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow after Discount [Abstract]
Future cash inflows	75,293	73,429
Future production costs	(42,601)	(41,935)
Future development costs	(2,795)	(2,958)
Future income tax expenses	(2,666)	(1,512)
Future net cash flows excluding abandonment, decommissioning and reclamation	27,231	27,024
Future abandonment, decommissioning and reclamation	(18,026)	(18,585)
Future net cash flows	9,205	8,439
10% annual discount for timing of cash flows	2,697	4,790
Standardized measure of discounted future net cash flows	11,902	13,229
United States
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow after Discount [Abstract]
Future cash inflows	12,043	15,995
Future production costs	(5,080)	(4,168)
Future development costs	0	0
Future income tax expenses	(161)	(264)
Future net cash flows excluding abandonment, decommissioning and reclamation	6,802	11,563
Future abandonment, decommissioning and reclamation	(50)	(42)
Future net cash flows	6,752	11,521
10% annual discount for timing of cash flows	(2,804)	(4,837)
Standardized measure of discounted future net cash flows	$ 3,948	$ 6,684