Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 198,193	$ 210,010
Accounts receivable:
Trade	17,828	36,437
Other, net	7,696	8,149
Inventories:
Concentrates, doré, and stockpiled ore	30,167	25,906
Materials and supplies	45,200	41,859
Derivatives assets	9,923	2,709
Other current assets	13,389	16,557
Total current assets	322,396	341,627
Investments	23,931	10,844
Restricted cash	1,041	1,053
Properties, plants, equipment and mineral interests, net	2,295,962	2,310,810
Operating lease right-of-use assets	11,649	12,435
Deferred income taxes	45,562	45,562
Derivatives assets	(12,897)	(2,503)
Other non-current assets	3,665	3,974
Total assets	2,717,103	2,728,808
Current liabilities:
Accounts payable and accrued liabilities	84,997	68,100
Accrued payroll and related benefits	26,945	28,714
Accrued taxes	8,341	12,306
Finance and operating leases	8,580	8,098
Accrued interest	14,435	14,454
Derivatives liabilities	4,228	19,353
Other current liabilities	109	99
Accrued reclamation and closure costs	10,594	9,259
Total current liabilities	158,229	160,383
Finance and operating leases	18,154	17,726
Accrued reclamation and closure costs	103,747	103,972
Long-term debt	507,841	508,095
Deferred tax liability	143,213	149,706
Derivatives liabilities	522	18,528
Other non-current liabilities	2,515	9,611
Total liabilities	934,221	968,021
Commitments and contingencies (Notes 4, 7, 8, and 10)
Preferred stock, 5,000,000 shares authorized: Series B preferred stock, $0.25 par value, 157,816 shares issued and outstanding, liquidation preference — $7,891	39	39
Common stock, 25 cent par value, 750,000,000 authorized shares; issued June 30, 2022 — 548,037,253 shares and December 31, 2021 — 545,534,760 shares	137,241	136,391
Capital surplus	2,043,621	2,034,485
Accumulated deficit	(370,048)	(353,651)
Accumulated other comprehensive income (loss)	3,727	(28,456)
Less treasury stock, at cost; June 30, 2022 — 8,132,553 shares and December 31, 2021 — 7,395,295 shares issued and held in treasury	(31,698)	(28,021)
Total stockholders’ equity	1,782,882	1,760,787
Total liabilities and stockholders’ equity	$ 2,717,103	$ 2,728,808