Other Expense, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Expense, Net
Unrealized currency exchange (gain) loss	$ 1,618	$ (127)
Realized currency exchange loss (gain)	(291)	151
Unrealized (gain) loss from gold and silver rounds/bullion, net	151	(17)
Other expense (income)	35	18
Total	$ 1,513	$ 25