Accrued Expenses and Other Current Liabilities (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2021

Dec. 31, 2020

Disclosure Text Block Supplement [Abstract]

Schedule of accrued expenses and other current liabilities

	December 31, 2020		September 30, 2021
Payables to exiting investors	$	30,000	$	—
Payables for purchase of property, plant and equipment		15,122		13,017
Product warranty		4,296		18,690
Other current liabilities		3,959		8,469
Accrued payroll and welfare		2,704		2,818
Interest payable		1,379		2,674
Accrued expenses		1,696		1,972
Other tax payable		1,472		425
Total	$	60,628	$	48,065

	December 31, 2019		December 31, 2020
Payable to exiting Investors	$	—	$	30,000
Payables for purchase of property, plant and equipment		23,515		15,122
Product warranty		3,723		4,296
Accrued payroll and welfare		2,577		2,704
Accrued expenses		2,103		1,696
Deferred subsidy income-current		127		215
Deposits received from the contractors		275		102
Other tax payable		494		1,472
Other current liabilities		2,181		5,021
Total	$	34,995	$	60,628