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REVENUE FROM CONTRACTS WITH CUSTOMERS - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | $ 3,998 | $ 4,573 | $ 8,385 | $ 9,416
Oil |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,933 | 1,478 | 3,313 | 3,203
Natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 461 | 307 | 836 | 629
Natural gas liquids |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 158 | 125 | 290 | 219
Drilling and pump |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,389 | 2,593 | 3,331 | 5,239
Contingent residual payments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income |  |  | 485 |
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 57 | 70 | 130 | 126
United states |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,393 | 2,593 | 3,820 | 5,246
Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 2,605 | 1,980 | 4,565 | 4,170
Goods transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 2,609 | 1,980 | 5,054 | 4,177
Services transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,389 | 2,593 | 3,331 | 5,239
Oil and natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 2,552 | 1,910 | 4,439 | 4,051
Oil and natural gas | Oil |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,933 | 1,478 | 3,313 | 3,203
Oil and natural gas | Natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 461 | 307 | 836 | 629
Oil and natural gas | Natural gas liquids |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 158 | 125 | 290 | 219
Oil and natural gas | Drilling and pump |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Oil and natural gas | Contingent residual payments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income |  |  | 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 | 0 | 0 | 0 | 0
Oil and natural gas | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 2,552 | 1,910 | 4,439 | 4,051
Oil and natural gas | Goods transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 2,552 | 1,910 | 4,439 | 4,051
Oil and natural gas | Services transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Contract drilling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,389 | 2,593 | 3,331 | 5,239
Contract drilling | Oil |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Contract drilling | Natural gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Contract drilling | Natural gas liquids |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Contract drilling | Drilling and pump |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,389 | 2,593 | 3,331 | 5,239
Contract drilling | Contingent residual payments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income |  |  | 0 |
Contract drilling | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Contract drilling | United states |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,389 | 2,593 | 3,331 | 5,239
Contract drilling | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Contract drilling | Goods transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Contract drilling | Services transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 1,389 | 2,593 | 3,331 | 5,239
Land investment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 485 | 0
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 | Drilling and pump |  |  |  |
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 |  |  | 485 |
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 | 0 | 485 | 0
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 | 0 | 485 | 0
Land investment | Services transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 0 | 0 | 0 | 0
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 57 | 70 | 130 | 126
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 | Drilling and pump |  |  |  |
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 | 57 | 70 | 130 | 126
Other | United states |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 4 | 0 | 4 | 7
Other | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 53 | 70 | 126 | 119
Other | Goods transferred at a point in time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | 57 | 70 | 130 | 126
Other | Services transferred over time |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue before interest income | $ 0 | $ 0 | $ 0 | $ 0

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