Deposits (current and non-current) and Other Current Assets - Schedule of Deposits and Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deposits
Deposits for research and development, prototype and production parts, and other	$ 21,280	$ 29,318
Deposits for goods and services yet to be received (“Future Work”)	1,676	1,776
Deposits	22,956	31,094
Deposits, current portion	10,499	31,094
Deposits, non-current portion	12,457	0
Other current assets
Prepaid expenses	7,117	4,832
Other current assets	1,846	1,295
Other current assets	$ 8,963	$ 6,127