SUPPLEMENTARY OIL AND NATURAL GAS INFORMATION (UNAUDITED) - PROVED UNDEVELOPED RESERVES (Details) bbl in Thousands, Mcf in Thousands, Boe in Thousands	12 Months Ended
	Sep. 30, 2024 Boe Mcf bbl
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period | Boe	211
Conversion to proved developed reserves | Boe	(155)
Revisions of previous estimates | Boe	(56)
Additions due to a new well | Boe	239
Balance at the end of the period | Boe	239
Proved developed reserves - total, balance at the beginning of the period | Boe	2,132
Proved developed reserves - total, balance at the end of the period | Boe	2,184
Canada
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period | Boe	211
Conversion to proved developed reserves | Boe	(155)
Revisions of previous estimates | Boe	(56)
Additions due to a new well | Boe	239
Balance at the end of the period | Boe	239
Proved developed reserves - total, balance at the beginning of the period | Boe	1,561
Proved developed reserves - total, balance at the end of the period | Boe	1,676
United States
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period | Boe	0
Conversion to proved developed reserves | Boe	0
Revisions of previous estimates | Boe	0
Additions due to a new well | Boe	0
Balance at the end of the period | Boe	0
Proved developed reserves - total, balance at the beginning of the period | Boe	571
Proved developed reserves - total, balance at the end of the period | Boe	508
Oil
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period	92
Conversion to proved developed reserves	(98)
Revisions of previous estimates	6
Additions due to a new well	109
Balance at the end of the period	109
Proved developed reserves - volume, balance at the beginning of the period	807
Proved developed reserves - volume, balance at the end of the period	873
Oil | Canada
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period	92
Conversion to proved developed reserves	(98)
Revisions of previous estimates	6
Additions due to a new well	109
Balance at the end of the period	109
Proved developed reserves - volume, balance at the beginning of the period	695
Proved developed reserves - volume, balance at the end of the period	783
Oil | United States
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period	0
Conversion to proved developed reserves	0
Revisions of previous estimates	0
Additions due to a new well	0
Balance at the end of the period	0
Proved developed reserves - volume, balance at the beginning of the period	112
Proved developed reserves - volume, balance at the end of the period	90
Natural gas liquids
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period	18
Conversion to proved developed reserves	(10)
Revisions of previous estimates	(8)
Additions due to a new well	23
Balance at the end of the period	23
Proved developed reserves - volume, balance at the beginning of the period	309
Proved developed reserves - volume, balance at the end of the period	340
Natural gas liquids | Canada
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period	18
Conversion to proved developed reserves	(10)
Revisions of previous estimates	(8)
Additions due to a new well	23
Balance at the end of the period	23
Proved developed reserves - volume, balance at the beginning of the period	132
Proved developed reserves - volume, balance at the end of the period	176
Natural gas liquids | United States
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period	0
Conversion to proved developed reserves	0
Revisions of previous estimates	0
Additions due to a new well	0
Balance at the end of the period	0
Proved developed reserves - volume, balance at the beginning of the period	177
Proved developed reserves - volume, balance at the end of the period	164
Natural gas
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period | Mcf	608
Conversion to proved developed reserves | Mcf	(279)
Revisions of previous estimates | Mcf	(330)
Additions due to a new well | Mcf	641
Balance at the end of the period | Mcf	640
Proved developed reserves - volume, balance at the beginning of the period | Mcf	6,093
Proved developed reserves - volume, balance at the end of the period | Mcf	5,815
Natural gas | Canada
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period | Mcf	608
Conversion to proved developed reserves | Mcf	(279)
Revisions of previous estimates | Mcf	(330)
Additions due to a new well | Mcf	641
Balance at the end of the period | Mcf	640
Proved developed reserves - volume, balance at the beginning of the period | Mcf	4,402
Proved developed reserves - volume, balance at the end of the period | Mcf	4,301
Natural gas | United States
Changes in the estimates of net interests in total proved undeveloped reserves of oil, natural gas liquids and natural gas
Balance at the beginning of the period | Mcf	0
Conversion to proved developed reserves | Mcf	0
Revisions of previous estimates | Mcf	0
Additions due to a new well | Mcf	0
Balance at the end of the period | Mcf	0
Proved developed reserves - volume, balance at the beginning of the period | Mcf	1,691
Proved developed reserves - volume, balance at the end of the period | Mcf	1,514