Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 9,434	$ 27,389
Accounts receivable:
Trade	6,877	4,184
Taxes	25,326	14,191
Other, net	7,367	7,443
Inventories:
Concentrates, doré, and stockpiled ore	45,285	53,172
Materials and supplies	35,317	34,361
Prepaid taxes	288	12,231
Other current assets	15,524	11,179
Total current assets	145,418	164,150
Non-current investments	5,815	6,583
Non-current restricted cash and investments	1,025	1,025
Properties, plants, equipment and mineral interests, net	2,485,869	2,520,004
Operating lease right-of-use assets	19,019	0
Non-current deferred income taxes	3,395	1,987
Other non-current assets and deferred charges	10,172	10,195
Total assets	2,670,713	2,703,944
Current liabilities:
Accounts payable and accrued liabilities	69,336	77,861
Accrued payroll and related benefits	21,357	30,034
Accrued taxes	1,434	7,727
Current portion of finance leases	5,392	5,264
Current portion of operating leases	6,628	0
Accrued interest	5,984	5,961
Other current liabilities	898	5,937
Current portion of accrued reclamation and closure costs	6,824	3,410
Total current liabilities	117,853	136,194
Non-current finance leases	8,013	7,871
Non-current operating leases	12,410	0
Accrued reclamation and closure costs	103,782	104,979
Long-term debt	586,667	532,799
Non-current deferred tax liability	148,338	173,537
Non-current pension liability	48,448	47,711
Other non-current liabilities	5,974	9,890
Total liabilities	1,031,485	1,012,981
Commitments and contingencies (Notes 2, 4, 7, 9, and 11)
STOCKHOLDERS' EQUITY
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, $0.25 par value, 750,000,000 authorized shares; issued and outstanding 2019 — 488,870,345 shares and 2018 — 482,603,937 shares	123,701	121,956
Capital surplus	1,895,617	1,880,481
Accumulated deficit	(323,079)	(248,308)
Accumulated other comprehensive loss	(34,670)	(42,469)
Less treasury stock, at cost; 2019 — 5,941,436 shares and 2018 — 5,226,791 shares issued and held in treasury	(22,380)	(20,736)
Total stockholders’ equity	1,639,228	1,690,963
Total liabilities and stockholders’ equity	$ 2,670,713	$ 2,703,944