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Revenue (Tables) | 3 Months Ended
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Mar. 31, 2020
Revenue |
Disaggregation of revenue | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended
​ | ​ | March 31,
​ |  | 2020 |  | 2019
Sales to do-it-yourself customers | ​ | $ | 1,345,482 | ​ | $ | 1,337,029
Sales to professional service provider customers |  | ​ | 1,070,199 |  | ​ | 1,038,781
Other sales and sales adjustments |  | ​ | 60,806 |  | ​ | 34,798
Total sales | ​ | $ | 2,476,487 | ​ | $ | 2,410,608

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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=118956577&loc=SL49130545-203045 + Details
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