Revenue Revenue by Geographical Location (Tables)

3 Months Ended

Mar. 31, 2018

Revenue [Abstract]

Disaggregation of Revenue [Table Text Block]

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:

	Three Months Ended March 31,
	2018		2017
Product and service revenue recognized at point in time	$	194,683	$	148,530
Extended warranty and service contracts recognized over time	934		821
Total	$	195,617	$	149,351

The following table presents our net sales by product line:

	Three Months Ended March 31,
	2018		2017
Semiconductor capital market	$	136,010	$	104,648
Industrial power capital market	35,199		24,179
Global support	24,408		20,524
Total	$	195,617	$	149,351

The following table presents our net sales by geographic region:

	Three Months Ended March 31,
	2018				2017
Sales to external customers:
United States	$	130,369	66.5	%	$	104,715	70.1	%
Canada	111		0.1	%	16		0.1	%
North America	130,480		66.6	%	104,731		70.2	%
People's Republic of China	9,551		4.9	%	8,133		5.4	%
Other Asian countries	30,307		15.5	%	21,436		14.4	%
Asia	39,858		20.4	%	29,569		19.8	%
Germany	19,286		9.9	%	11,854		7.9	%
United Kingdom	1,948		1.0	%	3,197		2.1	%
Other European countries	4,045		2.1	%	—		—	%
Europe	25,279		13.0	%	15,051		10.0	%
Total	$	195,617	100.0	%	$	149,351	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:

	Three Months Ended March 31,
	2018		2017
Product and service revenue recognized at point in time	$	194,683	$	148,530
Extended warranty and service contracts recognized over time	934		821
Total	$	195,617	$	149,351