Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued salaries, benefits and bonus	$ 59,559	$ 36,892
Accrued professional, consulting and lobbying fees	5,282	3,055
Accrued warranty expense	1,363	769	$ 745	$ 1,476
Accrued income and other taxes	4,459	3,848
Accrued inventory in transit	6,316	4,597
Other accrued expenses	11,915	10,682
Accrued liabilities	$ 88,894	$ 59,843