Goodwill (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Value of Goodwill

The changes in the carrying value of goodwill were as follows (in thousands):

	Amount
Balance as of December 31, 2017	$	113,208
Balance as of December 31, 2018	113,208
Acquisition of Sualab Co., Ltd.	130,142
Foreign exchange rate changes	95
Balance as of December 31, 2019	$	243,445