Goodwill (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Changes in Goodwill

Changes in goodwill for the years ended December 31, were as follows:

Balance at December 31, 2018	$	132,437
Acquisitions:
Wafer fabrication in Greenock, Scotland		931
Canyon Investment		1,671
ERIS acquisition of Yea Shin Technology Corporation		4,320
Foreign currency translation adjustment		1,959
Balance at December 31, 2019		141,318
Acquisitions:
Savitech		13,962
Foreign currency translation adjustment		3,051
Balance at December 31, 2020	$	158,331