Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 77,148	$ 55,645
Receivables	22,490	18,666
Inventory	46,978	55,886
Ore on leach pads	72,326	66,192
Prepaid expenses and other	20,285	14,047
Current assets	239,227	210,436
NON-CURRENT ASSETS
Property, plant and equipment, net	226,115	248,789
Mining properties, net	708,744	711,955
Ore on leach pads, noncurrent	87,420	71,539
Restricted assets	8,819	8,752
Equity and debt securities	19,862	35,646
Receivables	23,493	28,709
Other	57,466	62,810
TOTAL ASSETS	1,371,146	1,378,636
CURRENT LIABILITIES
Accounts payable	71,461	69,176
Accrued liabilities and other	107,990	95,616
Debt	23,265	22,746
Reclamation	3,094	3,114
Current liabilities	205,810	190,652
NON-CURRENT LIABILITIES
Debt	277,873	272,751
Reclamation	139,608	133,417
Deferred tax liabilities	30,947	41,976
Other long-term liabilities	52,681	72,836
Non-current liabilities	$ 501,109	$ 520,980
Common Stock, Shares, Outstanding	243,744,601	241,529,021
STOCKHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 243,744,601 issued and outstanding at September 30, 2020 and 241,529,021 at December 31, 2019	$ 2,437	$ 2,415
Additional paid-in capital	3,608,102	3,598,472
Accumulated other comprehensive income (loss)	(26,312)	(136)
Accumulated deficit	(2,920,000)	(2,933,747)
Stockholders' equity	664,227	667,004
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,371,146	$ 1,378,636
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	243,744,601	241,529,021