CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Sales, net	$ 29,029	$ 26,435	$ 87,133	$ 61,105
Production costs	17,216	16,286	51,982	42,856
Depreciation and amortization	3,521	4,340	11,299	13,537
Reclamation and remediation	47	44	152	119
Total mine cost of sales	20,784	20,670	63,433	56,512
Mine gross profit	8,245	5,765	23,700	4,593
Costs and expenses:
General and administrative expenses	2,355	2,360	6,070	5,961
Exploration expenses	1,805	1,019	3,660	2,132
Restructuring expenses			496
Stock-based compensation	30	305	711	1,175
Other expense (income), net	174	(599)	727	(1,043)
Total costs and expenses	4,364	3,085	11,664	8,225
Income (loss) before income taxes	3,881	2,680	12,036	(3,632)
Provision for income taxes (benefit)	2,352	2,931	6,697	(420)
Net income (loss) from continuing operations	1,529	(251)	5,339	(3,212)
Net income from discontinued operations, net of income taxes		5,252		3,280
Net income	$ 1,529	$ 5,001	$ 5,339	$ 68
Net income per common share:
Basic and diluted net income (loss) per common share from continuing operations	$ 0.02	$ 0.01	$ 0.07	$ (0.05)
Basic and diluted net income per common share from discontinued operations		0.06		0.05
Basic and diluted net income per common share	$ 0.02	$ 0.07	$ 0.07	$ 0.00
Weighted average shares outstanding:
Basic	74,552,545	70,641,938	74,481,281	68,896,059
Diluted	74,898,520	71,044,528	74,842,095	69,289,349