Deposits and Other Current Assets - Deposits and Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Deposits:
Deposits for research and development, prototype and production parts, and other	$ 59,783	$ 40,879
Deposits for goods and services yet to be received (“Future Work”)	2,773	3,187
Total deposits	62,556	44,066
Other current assets:
Prepaid expenses	11,260	14,437
Other current assets	9,703	3,052
Total other current assets	$ 20,963	$ 17,489