INTANGIBLE ASSETS, NET - Narrative (Details) $ in Thousands, € in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) installment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2023 EUR (€)	Dec. 31, 2022 EUR (€)
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 7,400	$ 5,500	$ 0
Acquired intangible assets included in liabilities	0	0	47,181
Accrued expenses and other current liabilities	207,022	179,571
Other long-term liabilities	21,512	6,684
S-WAY Product and Platform license
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 7,100	5,400
S-WAY Product and Platform license | Series D Preferred Stock
Finite-Lived Intangible Assets [Line Items]
Useful life	7 years				7 years
FCPM License
Finite-Lived Intangible Assets [Line Items]
Useful life	7 years				7 years
Acquired intangible assets included in liabilities			$ 47,200	€ 40.0
Accrued expenses and other current liabilities	$ 13,800	32,100			€ 12.5	€ 30.0
Other long-term liabilities	$ 5,500	$ 0			€ 5.0
Number of installment payments | installment	2