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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) | 3 Months Ended
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Mar. 31, 2021
REVENUE FROM CONTRACTS WITH CUSTOMERS [Abstract] |
Disaggregated Revenue Information | The Company assesses revenues based upon the nature or type of goods or services it provides and the geographic location of the related businesses. The following tables present disaggregated revenue information:
|  | Three Months Ended March 31, |
|  | 2021 |  |  | 2020 |
Single Wafer Cleaning, Tahoe and Semi-Critical Cleaning Equipment |  | $ | 32,413 |  |  | $ | 22,784 |
ECP (front-end and packaging), Furnace and Other Technologies |  |  | 5,550 |  |  |  | - |
Advanced Packaging (excluding ECP), Services & Spares |  |  | 5,769 |  |  |  | 1,564 |
Total Revenue By Product Category |  |  | 43,732 |  |  |  | 24,348 |
Wet cleaning and other front-end processing tools |  |  | 31,900 |  |  |  | 22,784 |
Advanced packaging, other back-end processing tools, services and spares |  |  | 11,832 |  |  |  | 1,564 |
Total Revenue Front-end and Back-End |  | $ | 43,732 |  |  | $ | 24,348 |
|  | Three Months Ended March 31, |
|  | 2021 |  |  | 2020 |
Mainland China |  | $ | 43,696 |  |  | $ | 24,289 |
Other Regions |  |  | 36 |  |  |  | 59 |
|  | $ | 43,732 |  |  | $ | 24,348 |

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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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