CONDENSED CONSOLIDATED INTERIM STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Sales, net	$ 23,869	$ 29,029	$ 106,350	$ 87,133
Cost of sales:
Production costs	19,380	17,216	61,176	51,982
Depreciation and amortization	6,609	3,521	19,829	11,299
Reclamation and remediation	58	47	181	152
Total cost of sales	26,047	20,784	81,186	63,433
Mine gross (loss) profit	(2,178)	8,245	25,164	23,700
Costs and expenses:
General and administrative expenses	1,799	2,355	5,618	6,070
Exploration expenses	4,973	1,805		3,660
Restructuring expenses				496
Stock-based compensation	450	30	1,617	711
Realized and unrealized (gain) loss on zinc zero cost collar	(218)	184	120	184
Other expense (income), net	765	(10)	1,817	543
Total costs and expenses	7,769	4,364	19,287	11,664
(Loss) income before income taxes	(9,947)	3,881	5,877	12,036
Provision for income taxes	(217)	2,352	8,915	6,697
Net (loss) income	$ (9,730)	$ 1,529	$ (3,038)	$ 5,339
Net (loss) income per common share:
Basic net (loss) income per common share	$ (0.11)	$ 0.02	$ (0.03)	$ 0.07
Diluted net (loss) income per common share	$ (0.11)	$ 0.02	$ (0.03)	$ 0.07
Weighted average shares outstanding:
Basic	88,391,220	74,552,545	88,358,188	74,481,281
Diluted	88,391,220	74,898,520	88,358,188	74,842,095
Oaxaca, Mexico
Costs and expenses:
Exploration expenses	$ 1,143		$ 3,190
Michigan, USA
Costs and expenses:
Exploration expenses	$ 3,830		$ 6,925