SUPPLEMENTARY OIL AND NATURAL GAS INFORMATION (UNAUDITED) - COSTS INCURRED IN OIL AND NATURAL GAS PROPERTY ACQUISITION, EXPLORATION AND DEVELOPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Costs Incurred in Oil and Natural Gas Property Acquisition, Exploration and Development
Acquisition of proved properties	$ 0	$ 146
Acquisition of unproved properties	0	0
Exploration costs	22	34
Development costs	234	4,048
Total	256	4,228
Canada
Costs Incurred in Oil and Natural Gas Property Acquisition, Exploration and Development
Acquisition of proved properties	0	146
Acquisition of unproved properties	0	0
Exploration costs	22	34
Development costs	234	3,865
Total	256	4,045
United States
Costs Incurred in Oil and Natural Gas Property Acquisition, Exploration and Development
Acquisition of proved properties	0	0
Acquisition of unproved properties	0	0
Exploration costs	0	0
Development costs	0	183
Total	$ 0	$ 183