Property, Plant and Equipment & Natural Gas Properties - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Jul. 31, 2026 USD ($)	Sep. 30, 2026 USD ($)	Sep. 30, 2026 TJ / d	Sep. 30, 2026 MMcf / d	Sep. 30, 2026 km	Sep. 30, 2026 mi	Jun. 30, 2026 USD ($)
Property, Plant, and Equipment [Line Items]
Net proceeds from sales as a reduction		$ 2,800
Property, plant and equipment, net		1,097					$ 744
Sturt plateau compression facility (“SPCF”), capacity, volume | TJ / d			50
Sturt plateau compression facility (“SPCF”), volume			40	41
Sturt plateau pipeline (SPP), distance					37	23
Syndicated Facility Agreement | Term loan
Property, Plant, and Equipment [Line Items]
Interest expense		2,800
Unproved properties
Property, Plant, and Equipment [Line Items]
Natural gas properties, successful efforts method:		890,171					807,036
Research and development tax credit	$ 2,100
Assets under construction - natural gas equipment
Property, Plant, and Equipment [Line Items]
Natural gas properties, successful efforts method:		$ 89,081					$ 72,287