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RESTRICTED ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2017
Receivables [Abstract] |
Summary of Restricted Assets | A summary of restricted assets is as follows:
| December 31,
| 2017 |  | 2016
Non Current: |  |  |
Restricted assets - landfill closure | $ | 1,220 |  |  | $ | 1,002 |

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