Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Sales	$ 181,906	$ 146,339	$ 559,537	$ 524,080
Cost of sales and other direct production costs	112,212	104,900	345,516	326,579
Depreciation, depletion and amortization	36,217	32,992	107,937	106,362
Total cost of sales	148,429	137,892	453,453	432,941
Gross profit	33,477	8,447	106,084	91,139
Other operating expenses:
General and administrative	7,596	11,003	30,449	28,989
Exploration and pre-development	13,686	15,128	25,546	39,136
Ramp-up and suspension costs	21,025	5,092	48,684	16,539
Provision for closed operations and environmental matters	2,256	1,781	6,411	4,154
Other operating (income) expense, net	1,555	902	(2,729)	5,310
Total other operating expenses	46,118	33,906	108,361	94,128
Loss from operations	(12,641)	(25,459)	(2,277)	(2,989)
Other income (expense):
Interest expense	(10,710)	(10,874)	(31,186)	(31,785)
Fair value adjustments, net	(6,397)	(4,240)	(5,774)	(14,703)
Net foreign exchange gain	4,176	5,667	434	8,111
Other income	1,657	1,853	4,425	4,828
Total other expense	(11,274)	(7,594)	(32,101)	(33,549)
Loss before income and mining taxes	(23,915)	(33,053)	(34,378)	(36,538)
Income and mining tax benefit (expense)	1,500	9,527	(6,904)	3,642
Net loss	(22,415)	(23,526)	(41,282)	(32,896)
Preferred stock dividends	(138)	(138)	(414)	(414)
Net loss applicable to common stockholders	(22,553)	(23,664)	(41,696)	(33,310)
Comprehensive income (loss):
Net Income (Loss)	(22,415)	(23,526)	(41,282)	(32,896)
Change in fair value of derivative contracts designated as hedge transactions	(11,384)	(12,692)	364	19,491
Comprehensive loss	$ (33,799)	$ (36,218)	$ (40,918)	$ (13,405)
Basic loss per common share after preferred dividends	$ (0.04)	$ (0.04)	$ (0.07)	$ (0.06)
Diluted loss per common share after preferred dividends	$ (0.04)	$ (0.04)	$ (0.07)	$ (0.06)
Weighted average number of common shares outstanding - basic	607,896,000	554,531,000	604,028,000	544,000,000
Weighted average number of common shares outstanding - diluted	607,896,000	554,531,000	604,028,000	544,000,000
Cash dividends declared per common share	$ 0.00625	$ 0.00625	$ 0.0125	$ 0.0125