Summary of Significant Accounting Policies - Special Purpose Acquisition Company - NETC (Details) - USD ($) $ in Thousands		6 Months Ended
	May 11, 2023	Jun. 30, 2023	Feb. 28, 2023	Dec. 31, 2022	Nov. 16, 2021
Summary of Significant Accounting Policies
Restricted cash held in trust		$ 105,444		$ 284,841
Amount removed from Trust Account for NETC stockholders	$ 186,900	186,933
Redeemable noncontrolling interest		513,817		678,604
Variable Interest Entity, Primary Beneficiary
Summary of Significant Accounting Policies
Restricted cash held in trust		105,400		284,800	$ 281,500
Redeemable noncontrolling interest		$ 105,300		$ 284,800
Vast Solar Pty Ltd.
Summary of Significant Accounting Policies
Minimum cash requirement			$ 50,000