Goodwill and Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill and Intangible Assets (Details) $ in Thousands	9 Months Ended
Sep. 30, 2021 USD ($)
Goodwill
Balance at December 31, 2020	$ 16,226
Change in value based on correction of purchase price calculation and allocation	(2,222)
Foreign currency exchange rate changes	(8)
Balance at September 30, 2021	13,996
Intangible Assets
Balance at December 31, 2020	5,694
Change in value based on correction of purchase price calculation and allocation	(340)
Amortization	(476)
Foreign currency exchange rate changes	(1)
Balance at September 30, 2021	$ 4,877

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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