Segment Information (Tables)

6 Months Ended

Jun. 30, 2020

Concentration Risk

Revenue from external customer by geographic regions

Revenue from customers in the geographic regions based on the location of contracting parties was as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(In thousands)	2020		2019		2020		2019
USA	$	32,014	$	29,964	$	66,802	$	64,203
Taiwan	3,752		12,760		10,816		14,861
South Korea	701		758		2,521		2,039
Japan	6,156		2,527		8,999		5,146
Europe	4,944		2,640		5,682		6,015
Canada	31		1,423		543		2,481
Singapore	8,802		4,725		16,432		6,609
Asia-Other	3,530		3,500		12,124		5,327
Total	$	59,930	$	58,297	$	123,919	$	106,681

Accounts receivable

Concentration Risk

Schedule of customer accounts representing 10% or more than 10% of total revenue

Accounts receivable from the Company’s major customers representing 10% or more of total accounts receivable at June 30, 2020 and December 31, 2019, respectively, was as follows:

	As of
Customer	June 30, 2020		December 31, 2019
Customer 1	18	%	14	%
Customer 2	*		19	%

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* Customer accounted for less than 10% of total accounts receivable in the period

Revenue

Concentration Risk

Schedule of customer accounts representing 10% or more than 10% of total revenue

Revenue from the Company’s major customers representing 10% or more of total revenue for the three and six months ended June 30, 2020 and 2019, respectively, was as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
Customer	2020		2019		2020		2019
Customer A	18	%	11	%	16	%	11	%
Customer B	15	%	*		14	%	*
Customer C	*		15	%	*		*
Customer D	*		14	%	*		15	%

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* Customer accounted for less than 10% of total revenue in the period