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Segment Information (Tables)
 6 Months Ended
Jun. 30, 2023
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 EndedSix Months Ended
 June 30,June 30,
(In thousands)2023202220232022
USA$35,429 $67,285 $99,068 $122,969 
South Korea48,613 2,572 62,757 4,037 
Singapore14,718 25,719 26,046 39,764 
Taiwan4,279 10,499 10,788 15,459 
China3,399 7,600 7,654 15,805 
Other13,394 7,457 27,281 22,148 
Total$119,832 $121,132 $233,594 $220,182 
Accounts receivable  
Concentration risk  
Schedule of customer accounts representing 10% or more than 10% of total balance
Accounts receivable from the Company’s major customers representing 10% or more of total accounts receivable at June 30, 2023 and December 31, 2022, respectively, was as follows:
As of
Customer June 30, 2023December 31, 2022
Customer 164 %*
Customer 2*23 %
Customer 3 *16 %
Customer 4*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 balance
Revenue from the Company’s major customers representing 10% or more of total revenue for the three and six months ended June 30, 2023 and 2022, respectively, was as follows:
Three Months EndedSix Months Ended
 June 30,June 30,
Customer 2023202220232022
Customer A38 %*25 %*
Customer B12 %19 %15 %21 %
Customer C*17 %*13 %
Customer D*13 %*13 %
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*    Customer accounted for less than 10% of total revenue in the period.