Goodwill and Intangible Assets - Summary of Activity Related to Intangible Assets, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Balance at the beginning of the period	$ 3,377	$ 12,381
Less: amortization expense	(1,295)	(2,331)
Foreign exchange impact		294
Balance at the end of the period	5,409	$ 10,344
Optelian and RIFT Acquisitions
Finite-Lived Intangible Assets [Line Items]
Intangible assets from acquisitions	$ 3,327