Contractual obligations (Details Narrative) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Contractual Obligations | |
| Upfront payment for silver streaming arrangement | $ 250,000 |
| Payable silver equivalent | 10.00% |
| Sale silver streaming arrangement | $ 19,500 |
| Payable silver content | 25.00% |