Deposits and Other Current Assets - Deposits and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deposits
Deposits for research and development, prototype and production parts, and other	$ 28,609	$ 40,879
Deposits for goods and services yet to be received (“Future Work”)	2,773	3,187
Total deposits	31,382	44,066
Other current assets
Prepaid expenses	13,309	14,437
Other current assets	8,412	3,052
Total other current assets	$ 21,721	$ 17,489