REVENUE FROM CONTRACTS WITH CUSTOMERS - DISAGGREGATION OF REVENUE (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Revenue before interest income	$ 13,643	$ 17,987
United States
Disaggregation of Revenue [Line Items]
Revenue before interest income	1,172	2,803
Canada
Disaggregation of Revenue [Line Items]
Revenue before interest income	12,471	15,184
Oil
Disaggregation of Revenue [Line Items]
Revenue before interest income	10,476	13,509
Natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	1,499	2,007
Natural gas liquids
Disaggregation of Revenue [Line Items]
Revenue before interest income	1,588	1,880
Contingent residual payments
Disaggregation of Revenue [Line Items]
Revenue before interest income		500
Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	80	91
Oil and natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	13,563	17,396
Oil and natural gas | United States
Disaggregation of Revenue [Line Items]
Revenue before interest income	1,171	2,303
Oil and natural gas | Canada
Disaggregation of Revenue [Line Items]
Revenue before interest income	12,392	15,093
Oil and natural gas | Oil
Disaggregation of Revenue [Line Items]
Revenue before interest income	10,476	13,509
Oil and natural gas | Natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	1,499	2,007
Oil and natural gas | Natural gas liquids
Disaggregation of Revenue [Line Items]
Revenue before interest income	1,588	1,880
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
Land investment
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	500
Land investment | United States
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	500
Land investment | Canada
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	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 | Contingent residual payments
Disaggregation of Revenue [Line Items]
Revenue before interest income		500
Land investment | Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	0
Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	80	91
Other | United States
Disaggregation of Revenue [Line Items]
Revenue before interest income	1	0
Other | Canada
Disaggregation of Revenue [Line Items]
Revenue before interest income	79	91
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 | Contingent residual payments
Disaggregation of Revenue [Line Items]
Revenue before interest income		0
Other | Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	80	91
Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenue before interest income	13,643	17,987
Goods transferred at a point in time | Oil and natural gas
Disaggregation of Revenue [Line Items]
Revenue before interest income	13,563	17,396
Goods transferred at a point in time | Land investment
Disaggregation of Revenue [Line Items]
Revenue before interest income	0	500
Goods transferred at a point in time | Other
Disaggregation of Revenue [Line Items]
Revenue before interest income	$ 80	$ 91