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Contingencies (Details) $ in Thousands, people in Millions	1 Months Ended
	Feb. 28, 2021 USD ($) people	Dec. 31, 2020 USD ($) people	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)
Commitments And Contingencies [Line Items]
Number of people | people	3.6	7.5
Contingent liability	$ 20,000			$ 0		$ 20,000
Contingent liability				20,249		0
Prepayments received				60,759		54,678	$ 2,983
Accrued payroll taxes		$ 300				$ 200
Xcel Energy Services Inc. | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Commitments And Contingencies [Line Items]
Prepayments received				$ 8,000	$ 8,000
SDG&E
Commitments And Contingencies [Line Items]
Consideration transferred	$ 50,000
Forecast
Commitments And Contingencies [Line Items]
Contingent liability			$ 30,000

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