Segment Information (Tables)

9 Months Ended

Sep. 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				Nine Months Ended
	September 30,				September 30,
(In thousands)	2020		2019		2020		2019
USA	$	29,068	$	33,218	$	95,870	$	97,421
Taiwan	8,234		4,186		19,050		19,047
South Korea	719		738		3,240		2,777
Japan	4,175		3,419		13,174		8,565
Europe	728		2,846		6,410		8,861
Canada	534		896		1,077		3,377
Singapore	6,754		7,695		23,186		14,304
Asia-Other	6,703		4,401		18,827		9,728
Total	$	56,915	$	57,399	$	180,834	$	164,080

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 September 30, 2020 and December 31, 2019, respectively, was as follows:

	As of
Customer	September 30, 2020		December 31, 2019
Customer 1	18	%	*
Customer 2	12	%	*
Customer 3	11	%	*
Customer 4	*		19	%
Customer 5	*		14	%

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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 nine months ended September 30, 2020 and 2019, respectively, was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
Customer	2020		2019		2020		2019
Customer A	18	%	*		17	%	10	%
Customer B	12	%	13	%	13	%	*
Customer C	*		14	%	*		15	%

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