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REVENUE RECOGNITION (Tables) | 6 Months Ended
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Jun. 30, 2021
REVENUE RECOGNITION |
Disaggregation of revenue by product line | ​
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​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Consumables | ​ | $ | 475,559 | ​ | $ | 333,671 | ​ | $ | 909,738 | ​ | $ | 739,511
Equipment | ​ |  | 350,895 | ​ |  | 257,056 | ​ |  | 673,737 | ​ |  | 553,207
Net sales | ​ | $ | 826,454 | ​ | $ | 590,727 | ​ | $ | 1,583,475 | ​ | $ | 1,292,718

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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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