Supplementary Cash Flow Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Supplementary Cash Flow Information | |||
| Unrealized loss (gain) on gold and silver rounds/bullion | $ 53 | $ (170) | $ (671) |
| Realized loss (gain) on gold and silver rounds/bullion | 2 | (1,003) | |
| Unrealized foreign currency exchange (gain) loss | 493 | 105 | (19) |
| Loss on disposition of fixed assets | 37 | 3 | 12 |
| Increase (decrease) in reserve for inventory | 175 | (148) | 885 |
| Stock based compensation related to restructuring | 809 | ||
| Unrealized loss on zinc zero cost collar | 1,844 | ||
| Other | 105 | 98 | |
| Total other operating adjustments | $ 2,709 | $ (404) | $ 305 |