Components of Other Expense (Income), Net (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2021

Dec. 31, 2020

Other Income and Expenses [Abstract]

Summary of Components of Other Income, Net

The components of other expense, net, are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Foreign currency exchange loss	(57)		(26)		(66)		(296)
Other, net	(127)		(79)		(190)		102
Other expense, net	$	(184)	$	(105)	$	(256)	$	(194)

The components of other expense (income), net, are as follows:

	For the Year Ended
	December 31,
	2019		2020
Revaluation of Share Purchase Option	$	903	$	—
Foreign currency exchange loss	733		672
Other income, net	(156)		(382)
Other expense, net	$	1,480	$	290