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RELATED PARTY TRANSACTIONS (Tables) | 3 Months Ended
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Mar. 31, 2020
RELATED PARTY TRANSACTIONS |
Schedule of related party transactions | Members of our Board of Directors hold various executive positions and serve as directors at other companies, including companies that are our customers. During the three months ended March 31, 2020 and 2019, we engaged in the following transactions with companies related to members of our Board of Directors, as described below: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, | ​
​ |  | 2020 |  | 2019 | ​
Sales to related parties | ​ | $ | — | ​ | $ | 352 | ​
Number of related party customers |  | ​ | 1 |  | ​ | 1 |
​ We did not have any accounts receivable balances from related party customers with outstanding balances as of March 31, 2020 and December 31, 2019.

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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