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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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Realized Gain Loss On Zinc Zero Cost Collar

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Unrealized Investment Gains Losses

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Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.

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Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

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