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Related party transactions (Tables) | 3 Months Ended
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Mar. 31, 2017
Related Party Transactions [Abstract] |
Schedule of related party transactions | A summary of the aforementioned significant related party transactions for the three months ended March 31, 2017 and 2016 is as follows:
|  | Three months ended March 31,
|  | 2017 | 2016
Net sales to Glencore |  | $ | 280,573 |  | $ | 280,377 |
Purchases from Glencore |  | 71,581 |  | 44,013 |
Purchases from BHH |  | 2,780 |  | 2,383 |

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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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