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Segment Reporting and Geographic Information | 12 Months Ended
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Dec. 31, 2024
Segment Reporting and Geographic Information |
Segment Reporting and Geographic Information | Note 16 — Segment Reporting and Geographic Information ​ The Company operates and measures its results in one operating segment and therefore has one reportable segment: the development, manufacture, sales, and support of semiconductor and thin film process equipment primarily sold to make electronic devices. The accounting policies of this one operating segment are the same as those described in the summary of significant accounting policies. The Chief Operating Decision Maker (“CODM”), the Chief Executive Officer, assesses segment performance and decides how to allocate resources based on net income that is reported on the Consolidated Statements of Operations. The measure of segment assets is reported on the Consolidated Balance Sheet as total assets. The Company does not have intra-entity sales or transfers. The CODM uses net income to evaluate income generated from segment assets (return on assets) in deciding whether to reinvest profits into the segment or into other parts of the Company, such as for acquisitions. Net income is used to monitor forecast versus actual results. The CODM also uses net income in competitive analysis by benchmarking the Company’s competitors. The competitive analysis along with the monitoring of forecasted versus actual results are used in assessing performance of the segment. The Company regularly provides management reports to the CODM on a consolidated expense basis which includes actuals, forecasted, and budgeted information. These reports are similar to the Company’s consolidated financial statements. There are no additional expenses categories and amounts that meet the definition of significant expense items that are regularly provided to the CODM and included in the reported measure of net income. ​ Sales by end-market is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | For the year ended December 31,
​ |  |  | 2024 |  | 2023 |  | 2022
​ | ​ | ​ | (in thousands)
Sales by end-market | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Semiconductor | ​ | ​ | $ | 466,611 | ​ | $ | 412,724 | ​ | $ | 369,369
Compound Semiconductor | ​ | ​ | ​ | 77,591 | ​ | ​ | 87,258 | ​ | ​ | 121,194
Data Storage | ​ | ​ |  | 98,852 | ​ |  | 88,473 | ​ |  | 87,544
Scientific & Other | ​ | ​ |  | 74,247 | ​ |  | 77,980 | ​ |  | 68,030
Total | ​ | ​ | $ | 717,301 | ​ | $ | 666,435 | ​ | $ | 646,137
​ The Company’s significant operations outside the United States include sales and service offices in China, Europe, and Rest of APAC. For geographic reporting, sales are attributed to the location in which the customer facility is located. ​ Sales and long-lived tangible assets by geographic region are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Net Sales to Unaffiliated Customers | ​ | Long-lived Tangible Assets
​ |  | 2024 |  | 2023 |  | 2022 |  | 2024 |  | 2023 |  | 2022
​ | ​ | (in thousands)
United States | ​ | $ | 164,564 | ​ | $ | 162,790 | ​ | $ | 197,433 | ​ | $ | 112,966 | ​ | $ | 117,594 | ​ | $ | 106,550
EMEA(1) | ​ |  | 61,730 | ​ |  | 76,697 | ​ |  | 87,837 | ​ |  | 154 | ​ |  | 219 | ​ |  | 60
China | ​ | ​ | 255,619 | ​ | ​ | 217,942 | ​ | ​ | 123,703 | ​ | ​ | 270 | ​ | ​ | 182 | ​ | ​ | 70
Rest of APAC | ​ | ​ | 234,591 | ​ | ​ | 208,693 | ​ | ​ | 235,735 | ​ | ​ | 399 | ​ | ​ | 464 | ​ | ​ | 601
Rest of World | ​ |  | 797 | ​ |  | 313 | ​ |  | 1,429 | ​ |  | — | ​ |  | — | ​ |  | —
Total | ​ | $ | 717,301 | ​ | $ | 666,435 | ​ | $ | 646,137 | ​ | $ | 113,789 | ​ | $ | 118,459 | ​ | $ | 107,281
(1) | EMEA consists of Europe, the Middle East, and Africa

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- Definition The entire disclosure for reporting segments including data and tables. 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