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Commitments and Contingencies - Long-Term Take-or-Pay Natural Gas Purchase Contracts (Details) - USD ($) $ in Millions	Jun. 30, 2024	Jan. 08, 2024	Sep. 30, 2023	Nov. 07, 2022
2022 Note Purchase Agreement
Fixed commitments under the contract payable in future
Amount of funding commitment				$ 5.5
Amount Funded			$ 5.5
Promissory notes interest rate				7.00%
2024 Note Purchase Agreement
Fixed commitments under the contract payable in future
Amount of funding commitment		$ 10.0
Amount Funded	$ 3.5
Promissory notes interest rate		8.00%
Natural Gas Supply Agreement
Fixed commitments under the contract payable in future
Remainder of 2024	1.3
2025	$ 1.5

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