Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued expenses and other current liabilities
Accrued payroll and benefits	$ 21,752	$ 19,180
Accrued legal contingencies	16,881	5,025
Capital lease, current portion	2,574	4,396
Tooling, machinery, and equipment received not invoiced	7,243	509
Engineering, design, and testing services received not invoiced	6,620	0
Deposits from customers	4,354	3,523
Due to affiliates	6,673	5,123
Obligation to issue registered shares of Class A Common Stock	12,635	0
Other current liabilities	11,780	14,626
Total accrued expenses and other current liabilities	$ 90,512	$ 52,382