Basis of Presentation and Summary of Significant Accounting Policies - Professional Engineering Contracts (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Professional Engineering Services Contracts
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Revenue	$ 1	$ (1,477)
Basic net loss per share (in usd per share)	$ 0.00	$ (0.09)
Diluted net loss per share (in usd per share)	$ 0.00	$ (0.09)
Individual Professional Services Contract
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Revenue	$ 1,100