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Revenue from Contracts with Customers (Tables) | 12 Months Ended
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Dec. 31, 2019
Revenue from Contracts with Customers |
Schedule of disaggregation of revenue | The Company’s revenues disaggregated by product category, for the years ended December 31, 2019, December 31, 2018 and December 31, 2017 was as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended
​ | ​ | December 31,
​ | ​ | 2019 | ​ | 2018 | ​ | 2017
​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​
Glaucoma |  | $ | 230,967 | ​ | $ | 181,278 |  | $ | 159,254
Corneal Health | ​ | ​ | 6,017 | ​ |  | — | ​ |  | —
Total |  | $ | 236,984 | ​ | $ | 181,278 | ​ | $ | 159,254
​ The following table presents the Company’s revenues disaggregated by geography for the years ended December 31, 2019, December 31, 2018 and December 31, 2017 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended |
​ | ​ | December 31, |
Geographic net sales information (in thousands) | ​ | 2019 | ​ | 2018 | ​ | 2017 |
​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​
United States |  | $ | 192,456 | ​ | $ | 151,677 |  | $ | 140,902 | ​
International | ​ | ​ | 44,528 | ​ |  | 29,601 | ​ |  | 18,352 | ​
Total net sales |  | $ | 236,984 | ​ | $ | 181,278 | ​ | $ | 159,254 | ​

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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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