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Supplementary Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2021
Supplementary Cash Flow Information |
Schedule of Supplementary Cash Flow Information | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended September 30, | ​ | For the nine months ended September 30, | ​
​ | ​ | 2021 | ​ | 2020 | ​ | 2021 | ​ | 2020 | ​
​ | ​ | (in thousands) | ​ | (in thousands) | ​
Unrealized loss (gain) on gold and silver rounds/bullion | ​ | $ | 55 | ​ | $ | (716) | ​ | $ | 86 | ​ | $ | (1,175) | ​
Unrealized foreign currency exchange (gain) loss | ​ | ​ | (59) | ​ | ​ | 163 | ​ | ​ | 257 | ​ | ​ | 221 | ​
Unrealized loss on zinc zero cost collar | ​ | ​ | 144 | ​ | ​ | - | ​ | ​ | 144 | ​ | ​ | - | ​
Other | ​ | ​ | (106) | ​ | ​ | 81 | ​ | ​ | (12) | ​ | ​ | 123 | ​
Total other operating adjustments | ​ | $ | 34 | ​ | $ | (472) | ​ | $ | 475 | ​ | $ | (831) | ​

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