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Segment Information (Tables)
 3 Months Ended
Mar. 31, 2022
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
 March 31,
(In thousands)20222021
USA$55,684 $46,151 
Asia-Other17,792 3,574 
Singapore14,045 6,338 
Taiwan4,960 8,843 
Japan3,535 4,588 
Europe1,564 446 
South Korea1,465 388 
Canada5 54 
Total$99,050 $70,382 
Accounts receivable  
Concentration risk  
Schedule of customer accounts representing 10% or more than 10% of total
Accounts receivable from the Company’s major customers representing 10% or more of total accounts receivable at March 31, 2022 and December 31, 2021, respectively, was as follows:
As of
Customer March 31, 2022December 31, 2021
Customer 118 %*
Customer 217 %17 %
Customer 3 14 %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 from the Company’s major customers representing 10% or more of total revenue for the three months ended March 31, 2022 and 2021, respectively, was as follows:
Three Months Ended
 March 31,
Customer 20222021
Customer A25 %23 %
Customer B14 %*
Customer C*14 %
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*    Customer accounted for less than 10% of total revenue in the period.