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Segment Information
 12 Months Ended
Dec. 31, 2023
Segment Reporting [Abstract]  
Segment Information Segments and Major Customers
Operating segments are based upon the Company’s internal organization structure, the manner in which its operations are managed, the criteria used by its Chief Operating Decision Maker (“CODM”) to evaluate segment performance and availability of separate financial information regularly reviewed for resource allocation and performance assessment.
The Company has determined its CODM to be the Chief Executive Officer (“CEO”). The CEO reviews financial information presented on a consolidated basis for purposes of managing the business, allocating resources, making operating decisions and assessing financial performance. On this basis, the Company is organized and operates as a single segment within the semiconductor space. As of December 31, 2023, the Company has a single operating and reportable segment.
Accounts receivable from the Company’s major customers representing 10% or more of total accounts receivable at December 31, 2023 and 2022, respectively, was as follows:
As of December 31,
Customer20232022
Customer 149 %*
Customer 213 %14 %
Customer 312 %*
Customer 4*23 %
Customer 5*16 %
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*    Customer accounted for less than 10% of total accounts receivable in the period.
Revenue from the Company’s major customers representing 10% or more of total revenue for the years ended December 31, 2023, 2022 and 2021, respectively, was as follows:
Years Ended December 31,
Customer202320222021
Customer A27 %**
Customer B18 %19 %21 %
Customer C*17 %13 %
Customer D*14 %11 %
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*    Customer accounted for less than 10% of total revenue in the period.
Revenue from customers in the geographic regions based on the location of contracting parties was as follows:
Years Ended December 31,
(In thousands)202320222021
United States$176,821 $277,776 $211,419 
South Korea152,328 7,222 6,007 
Singapore53,327 57,309 39,798 
Other78,641 112,486 71,080 
Total$461,117 $454,793 $328,304 
At December 31, 2023, of the $67.8 million of total property, plant and equipment, approximately $64.1 million were located in the United States, $3.0 million were located in India and $0.7 million were located in other foreign locations. At December 31, 2022, of the $86.3 million of total property, plant and equipment, approximately $80.5 million were located in the United States, $3.4 million were located in India and $2.4 million were located in other foreign locations.