Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Sales	$ 199,500	$ 186,499
Cost of sales and other direct production costs	125,550	105,772
Depreciation, depletion and amortization	39,002	35,298
Total cost of sales	164,552	141,070
Gross profit	34,948	45,429
Other operating expenses:
General and administrative	12,070	8,294
Exploration and pre-development	4,967	12,808
Ramp-up and suspension costs	11,336	6,205
Provision for closed operations and environmental matters	1,044	901
Other operating (income) expense	(22)	2,463
Total other operating expenses	29,395	30,671
Income from operations	5,553	14,758
Other income (expense):
Interest expense	(10,165)	(10,406)
Fair value adjustments, net	3,181	5,965
Net foreign exchange gain (loss)	108	(2,038)
Other income	1,392	1,505
Total other expense	(5,484)	(4,974)
Income before income and mining taxes	69	9,784
Income and mining tax expense	(3,242)	(5,631)
Net (loss) income	(3,173)	4,153
Preferred stock dividends	(138)	(138)
Net (loss) income applicable to common stockholders	(3,311)	4,015
Comprehensive income (loss):
Net (loss) income	(3,173)	4,153
Change in fair value of derivative contracts designated as hedge transactions	6,516	(33,165)
Comprehensive income (loss)	$ 3,343	$ (29,012)
Basic (loss) income per common share after preferred dividends	$ (0.01)	$ 0.01
Diluted (loss) income per common share after preferred dividends	$ (0.01)	$ 0.01
Weighted average number of common shares outstanding - basic	600,075,000	538,490,000
Weighted average number of common shares outstanding - diluted	600,075,000	544,061,000
Cash dividends declared per common share	$ 0.01	$ 0.01