Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Revenue

Schedule of disaggregation of revenue

Disaggregation of Revenue

The following table presents our sales by product line, which includes certain reclassifications to prior comparative periods to conform to our current year presentation:

	Years Ended December 31,
	2019		2018			2017
Semiconductor Equipment	$	403,018	$	533,770	$	554,063
Industrial & Medical		245,992		185,122		116,949
Data Center Computing		91,438		—		—
Telecom & Networking		48,500		—		—
Total	$	788,948	$	718,892	$	671,012

The following table presents our sales by geographic region:

	Years Ended December 31,
	2019				2018				2017
North America	$	373,634	47.4	%	$	372,834	51.8	%	$	377,347	56.2	%
Asia		295,155	37.4			250,574	34.9			221,690	33.1
Europe		119,427	15.1			94,793	13.2			71,796	10.7
Other		732	0.1			691	0.1			179	—
Total	$	788,948	100.0	%	$	718,892	100.0	%	$	671,012	100.0	%

The following table presents our net sales by extended warranty and service contracts recognized over time and our product and service revenue recognized at a point in time:

	Years Ended December 31,
	2019		2018		2017
Product and service revenue recognized at point in time	$	786,918	$	715,055	$	667,440
Extended warranty and service contracts recognized over time		2,030		3,837		3,572
Total	$	788,948	$	718,892	$	671,012