XML 35 R23.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Related party transactions (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2016
Related Party Transactions [Abstract] |
Schedule of related party transactions | A summary of the aforementioned significant related party transactions for the three and nine months ended September 30, 2016 and 2015 is as follows:
| Three months ended September 30, |  | Nine months ended September 30,
| 2016 | 2015 |  | 2016 | 2015
Net sales to Glencore | $ | 301,111 |  | $ | 428,018 |  |  | $ | 871,771 |  | $ | 1,517,428 |
Purchases from Glencore | 62,317 |  | 86,664 |  |  | 156,507 |  | 328,120 |
Purchases from BHH | 2,568 |  | 13,515 |  |  | 7,666 |  | 41,768 |

X
- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration