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REVENUE (Tables) | 6 Months Ended
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Jun. 30, 2021
REVENUE |
Summary of deferred revenue, | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2021 |  | 2020
Deferred revenue | ​ | $ | 8,159 | ​ | $ | 8,671
Schedule of disaggregation of revenue | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Semiconductor Equipment | ​ | $ | 176,671 | ​ | $ | 145,424 | ​ | $ | 357,387 | ​ | $ | 279,049
Industrial and Medical | ​ |  | 83,197 | ​ |  | 70,886 | ​ |  | 161,612 | ​ |  | 132,865
Data Center Computing | ​ | ​ | 69,458 | ​ | ​ | 83,316 | ​ | ​ | 128,612 | ​ | ​ | 169,499
Telecom and Networking | ​ | ​ | 31,985 | ​ | ​ | 40,254 | ​ | ​ | 65,320 | ​ | ​ | 73,923
Total | ​ | $ | 361,311 | ​ | $ | 339,880 | ​ | $ | 712,931 | ​ | $ | 655,336
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2021 | ​ | 2020 |  | 2021 |  | 2020
Product | ​ | $ | 325,522 | ​ | $ | 311,770 | ​ | $ | 644,401 | ​ | $ | 601,131
Services | ​ | ​ | 35,789 |  | ​ | 28,110 | ​ | ​ | 68,530 |  | ​ | 54,205
Total | ​ | $ | 361,311 |  | $ | 339,880 | ​ | $ | 712,931 |  | $ | 655,336
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2021 | ​ | 2020 |  | 2021 |  | 2020
United States | ​ | $ | 139,525 | ​ | $ | 119,808 | ​ | $ | 271,123 | ​ | $ | 236,505
North America (excluding United States) | ​ | ​ | 26,112 |  | ​ | 29,952 | ​ | ​ | 52,359 |  | ​ | 77,586
Asia | ​ |  | 148,803 |  | ​ | 170,753 | ​ | ​ | 298,394 |  | ​ | 281,728
Europe | ​ |  | 44,491 |  | ​ | 19,048 | ​ | ​ | 84,913 |  | ​ | 58,184
Other | ​ |  | 2,380 |  | ​ | 319 | ​ | ​ | 6,142 |  | ​ | 1,333
Total | ​ | $ | 361,311 |  | $ | 339,880 | ​ | $ | 712,931 |  | $ | 655,336
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Product and service revenue recognized at point in time | ​ | $ | 361,071 | ​ | $ | 339,667 | ​ | $ | 712,464 | ​ | $ | 654,948
Extended warranty and service contracts recognized over time | ​ |  | 240 | ​ |  | 213 | ​ |  | 467 | ​ |  | 388
Total | ​ | $ | 361,311 | ​ | $ | 339,880 | ​ | $ | 712,931 | ​ | $ | 655,336

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- Definition Tabular disclosure of the type of arrangements and the corresponding amounts that comprise the current and noncurrent balance of deferred revenue as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6935-107765 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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