Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 52,895	$ 55,645
Receivables	19,722	18,666
Inventory	51,857	55,886
Ore on leach pads	83,035	66,192
Prepaid expenses and other	14,150	14,047
Current assets	221,659	210,436
NON-CURRENT ASSETS
Property, plant and equipment, net	242,018	248,789
Mining properties, net	702,960	711,955
Ore on leach pads, noncurrent	66,703	71,539
Restricted assets	8,123	8,752
Equity and debt securities	26,826	35,646
Receivables	23,149	28,709
Other	57,659	62,810
TOTAL ASSETS	1,349,097	1,378,636
CURRENT LIABILITIES
Accounts payable	61,519	69,176
Accrued liabilities and other	49,935	95,616
Debt	23,588	22,746
Reclamation	3,094	3,114
Current liabilities	138,136	190,652
NON-CURRENT LIABILITIES
Debt	319,521	272,751
Reclamation	135,436	133,417
Deferred tax liabilities	36,472	41,976
Other long-term liabilities	58,888	72,836
Non-current liabilities	550,317	520,980
STOCKHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,586,226 issued and outstanding at March 31, 2020 and 241,529,021 at December 31, 2019	2,436	2,415
Additional paid-in capital	3,603,785	3,598,472
Accumulated other comprehensive income (loss)	70	(136)
Accumulated deficit	(2,945,647)	(2,933,747)
Stockholders' equity	660,644	667,004
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,349,097	$ 1,378,636