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REVENUE RECOGNITION (Tables) | 12 Months Ended
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Dec. 31, 2020
REVENUE RECOGNITION |
Disaggregation of Revenue [Table Text Block] | The following table presents the Company’s Net sales disaggregated by product line: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2020 |  | 2019 |  | 2018
Consumables | ​ | $ | 1,509,509 | ​ | $ | 1,715,002 | ​ | $ | 1,755,652
Equipment | ​ |  | 1,145,891 | ​ |  | 1,288,270 | ​ |  | 1,273,022
Net sales | ​ | $ | 2,655,400 | ​ | $ | 3,003,272 | ​ | $ | 3,028,674

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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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