Revenues - Disaggregation of revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) oz	Jun. 30, 2021 USD ($) oz	Jun. 30, 2022 USD ($) oz	Jun. 30, 2021 USD ($) oz
Disaggregation of Revenue [Line Items]
Revenues	$ 3,831	$ 36,001	$ 12,997	$ 55,037
Gold sales
Disaggregation of Revenue [Line Items]
Revenues	$ 3,695	$ 30,900	$ 12,601	$ 48,441
Ounces Sold | oz	1,966	17,060	6,740	26,890
Silver sales
Disaggregation of Revenue [Line Items]
Revenues	$ 136	$ 5,101	$ 396	$ 6,596
Ounces Sold | oz	5,940	189,766	16,879	247,002