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REVENUE FROM CONTRACTS WITH CUSTOMERS - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | $ 3,565 | $ 4,660 | $ 7,473 | $ 9,807
Oil |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 2,601 | 2,985 | 5,744 | 6,877
Natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 488 | 678 | 837 | 1,390
Natural gas liquids |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 454 | 481 | 859 | 1,007
Contingent residual payments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income |  | 500 |  | 500
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 22 | 16 | 33 | 33
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 376 | 1,174 | 731 | 1,928
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 3,189 | 3,486 | 6,742 | 7,879
Goods transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 3,565 | 4,660 | 7,473 | 9,807
Oil and natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 3,543 | 4,144 | 7,440 | 9,274
Oil and natural gas | Oil |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 2,601 | 2,985 | 5,744 | 6,877
Oil and natural gas | Natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 488 | 678 | 837 | 1,390
Oil and natural gas | Natural gas liquids |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 454 | 481 | 859 | 1,007
Oil and natural gas | Contingent residual payments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income |  | 0 |  | 0
Oil and natural gas | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Oil and natural gas | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 376 | 674 | 731 | 1,428
Oil and natural gas | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 3,167 | 3,470 | 6,709 | 7,846
Oil and natural gas | Goods transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 3,543 | 4,144 | 7,440 | 9,274
Land investment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 500 | 0 | 500
Land investment | Oil |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Land investment | Natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Land investment | Natural gas liquids |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Land investment | Contingent residual payments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income |  | 500 |  | 500
Land investment | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Land investment | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 500 | 0 | 500
Land investment | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Land investment | Goods transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 500 | 0 | 500
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 22 | 16 | 33 | 33
Other | Oil |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Other | Natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Other | Natural gas liquids |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Other | Contingent residual payments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income |  |  |  | 0
Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 22 | 16 | 33 | 33
Other | United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Other | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 22 | 16 | 33 | 33
Other | Goods transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | $ 22 | $ 16 | $ 33 | $ 33

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