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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
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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 |

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- Definition Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Form 20-F -Number Part II -Section Item 18 -Subparagraph (Instruction 2) -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 55 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477916/932-235-55-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-33 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 29 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-29 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-31 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-33 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 33 -SubTopic 235 -Topic 932 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-33 + Details
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