Related Party Balances and Transactions (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2021

Dec. 31, 2020

Related Party Transactions [Abstract]

Schedule of Relationship with the Group

Name	Relationship with the Group
Ochem	Controlled by CEO
Ochemate	Controlled by CEO

Name	Relationship with the Group
Ochem	Controlled by CEO
Ochemate	Controlled by CEO

Schedule of Amount due From Related Party

	December 31, 2019		December 31, 2020
Amount due from related party:
Ochem(i)	$	1,856	$	—
Total	$	1,856	$	—

Schedule of Related Party Transactions

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2021		2020		2021
Raw material sold to Ochem	$	11	$	113	$	11	$	406

	Year Ended December 31,
	2018		2019		2020
Raw material purchased from Ochem	$	30	$	—	$	—
Raw material purchased from Ochemate		2		—		—
Raw material sold to Ochem		—		—		167