CONDENSED CONSOLIDATED INTERIM STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
CONDENSED CONSOLIDATED INTERIM STATEMENTS OF OPERATIONS
Sales, net	$ 37,064	$ 30,836	$ 82,481	$ 58,104
Cost of sales:
Production costs	21,722	19,523	41,796	34,766
Depreciation and amortization	7,262	4,379	13,220	7,778
Reclamation and remediation	61	54	123	105
Total cost of sales	29,045	23,956	55,139	42,649
Mine gross profit	8,019	6,880	27,342	15,455
Costs and expenses:
General and administrative expenses	1,920	2,134	3,819	3,715
Exploration expenses	2,837	648	5,142	1,855
Restructuring expenses				496
Stock-based compensation	393	197	1,167	681
Realized and unrealized (gain) loss on zinc zero cost collar	(3,799)		338
Other expense, net	214	867	1,052	553
Total costs and expenses	1,565	3,846	11,518	7,300
Income before income taxes	6,454	3,034	15,824	8,155
Provision for income taxes	3,781	1,751	9,132	4,345
Net income	$ 2,673	$ 1,283	$ 6,692	$ 3,810
Net income per common share:
Basic net income per common share	$ 0.03	$ 0.02	$ 0.08	$ 0.05
Diluted net income per common share	$ 0.03	$ 0.02	$ 0.08	$ 0.05
Weighted average shares outstanding:
Basic	88,343,992	74,485,672	88,341,398	74,445,058
Diluted	88,791,552	74,987,559	88,646,849	74,868,187