Commitments and Contingencies (Details) - Supply Commitment	6 Months Ended
	Mar. 31, 2023 $ / Mcf MMcf
Long-term Purchase Commitment [Line Items]
Contract term	1 year
Purchase commitment volume	7,300
Weighted Average
Long-term Purchase Commitment [Line Items]
Fixed price contracts (USD per Mcf) | $ / Mcf	2.64
Short-term Contract with Customer
Long-term Purchase Commitment [Line Items]
Contract term	1 year
Purchase commitment volume	81,200
Long-term Contract with Customer Within Two To Three Years
Long-term Purchase Commitment [Line Items]
Purchase commitment volume	109,200
Long-term Contract with Customer Within Two To Three Years | Minimum
Long-term Purchase Commitment [Line Items]
Contract term	2 years
Long-term Contract with Customer Within Two To Three Years | Maximum
Long-term Purchase Commitment [Line Items]
Contract term	3 years
Long-term Contract with Customer Beyond Three Years
Long-term Purchase Commitment [Line Items]
Contract term	3 years
Purchase commitment volume	3,100