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Segment Reporting and Geographic Information | 12 Months Ended
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Dec. 31, 2023
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 Company’s Chief Operating Decision Maker, the Chief Executive Officer, evaluates performance of the Company and makes decisions regarding the allocation of resources based on total Company results. ​ Sales by end-market is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | For the year ended December 31,
​ |  |  | 2023 |  | 2022 |  | 2021
​ | ​ | ​ | (in thousands)
Sales by end-market | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Semiconductor | ​ | ​ | $ | 412,724 | ​ | $ | 369,369 | ​ | $ | 247,051
Compound Semiconductor | ​ | ​ | ​ | 87,258 | ​ | ​ | 121,194 | ​ | ​ | 106,972
Data Storage | ​ | ​ |  | 88,473 | ​ |  | 87,544 | ​ |  | 168,760
Scientific & Other | ​ | ​ |  | 77,980 | ​ |  | 68,030 | ​ |  | 60,494
Total | ​ | ​ | $ | 666,435 | ​ | $ | 646,137 | ​ | $ | 583,277
​ 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
​ |  | 2023 |  | 2022 |  | 2021 |  | 2023 |  | 2022 |  | 2021
​ | ​ | (in thousands)
United States | ​ | $ | 162,790 | ​ | $ | 197,433 | ​ | $ | 217,209 | ​ | $ | 117,594 | ​ | $ | 106,550 | ​ | $ | 99,220
EMEA(1) | ​ |  | 76,697 | ​ |  | 87,837 | ​ |  | 55,129 | ​ |  | 219 | ​ |  | 60 | ​ |  | 94
China | ​ | ​ | 217,942 | ​ | ​ | 123,703 | ​ | ​ | 105,998 | ​ | ​ | 182 | ​ | ​ | 70 | ​ | ​ | 67
Rest of APAC | ​ | ​ | 208,693 | ​ | ​ | 235,735 | ​ | ​ | 204,633 | ​ | ​ | 464 | ​ | ​ | 601 | ​ | ​ | 362
Rest of World | ​ |  | 313 | ​ |  | 1,429 | ​ |  | 308 | ​ |  | — | ​ |  | — | ​ |  | —
Total | ​ | $ | 666,435 | ​ | $ | 646,137 | ​ | $ | 583,277 | ​ | $ | 118,459 | ​ | $ | 107,281 | ​ | $ | 99,743
(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. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//280/tableOfContent Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 26 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-26 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-34 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 + Details
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