REVENUE FROM CONTRACTS WITH CUSTOMERS - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue before interest income	$ 2,731	$ 3,908
Oil
Disaggregation of Revenue [Line Items]
Revenue before interest income	1,903	3,143
Natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	471	349
Natural gas liquids
Disaggregation of Revenue [Line Items]
Revenue before interest income	256	405
Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	101	11
United States
Disaggregation of Revenue [Line Items]
Revenue before interest income	70	355
Canada
Disaggregation of Revenue [Line Items]
Revenue before interest income	2,661	3,553
Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue before interest income	2,731	3,908
Oil and natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	2,630	3,897
Oil and natural gas | Oil
Disaggregation of Revenue [Line Items]
Revenue before interest income	1,903	3,143
Oil and natural gas | Natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	471	349
Oil and natural gas | Natural gas liquids
Disaggregation of Revenue [Line Items]
Revenue before interest income	256	405
Oil and natural gas | Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Oil and natural gas | United States
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	355
Oil and natural gas | Canada
Disaggregation of Revenue [Line Items]
Revenue before interest income	2,630	3,542
Oil and natural gas | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue before interest income	2,630	3,897
Land investment
Disaggregation of Revenue [Line Items]
Revenue before interest income	70	0
Land investment | Oil
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Land investment | Natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Land investment | Natural gas liquids
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Land investment | Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	70	0
Land investment | United States
Disaggregation of Revenue [Line Items]
Revenue before interest income	70	0
Land investment | Canada
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Land investment | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue before interest income	70	0
Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	31	11
Other | Oil
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Other | Natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Other | Natural gas liquids
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Other | Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	31	11
Other | United States
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Other | Canada
Disaggregation of Revenue [Line Items]
Revenue before interest income	31	11
Other | Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue before interest income	$ 31	$ 11