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Other (Income) Expense, net (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Other (Income) Expense, net |  |  |  |
Unrealized currency exchange (gain) loss | $ (59) | $ 163 | $ 257 | $ 221
Realized currency exchange loss (gain) | 24 | (76) | (35) | (191)
Unrealized loss (gain) from gold and silver rounds/bullion, net (1) | 55 | (716) | 86 | (1,175)
Unrealized loss on zinc zero cost collar | 144 |  | 144 |
Realized loss on zinc zero cost collar | 40 |  | 40 |
Employee benefit obligation |  |  | 700 |
Other (income) expense | (30) | 30 | (465) | 102
Total | $ 174 | $ (599) | $ 727 | $ (1,043)

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