Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 55,645	$ 115,081
Receivables	18,666	29,744
Inventory	55,886	66,279
Ore on leach pads	66,192	75,122
Prepaid expenses and other	14,047	11,393
Current assets	210,436	297,619
NON-CURRENT ASSETS
Property, plant and equipment, net	248,789	298,451
Mining properties, net	711,955	971,567
Ore on leach pads, noncurrent	71,539	66,964
Restricted assets	8,752	12,133
Equity and debt securities	35,646	17,806
Receivables	28,709	31,151
Other	62,810	16,809
TOTAL ASSETS	1,378,636	1,712,500
CURRENT LIABILITIES
Accounts payable	69,176	47,210
Accrued liabilities and other	95,616	82,619
Debt	22,746	24,937
Reclamation	3,114	6,552
Current liabilities	190,652	161,318
NON-CURRENT LIABILITIES
Debt	272,751	433,889
Reclamation	133,417	128,994
Deferred tax liabilities	41,976	79,070
Other long-term liabilities	72,836	56,717
Non-current liabilities	520,980	698,670
STOCKHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 241,529,021 issued and outstanding at December 31, 2019 and 203,310,443 at December 31, 2018	2,415	2,033
Additional paid-in capital	3,598,472	3,443,082
Accumulated other comprehensive income (loss)	(136)	(59)
Accumulated deficit	(2,933,747)	(2,592,544)
Stockholders' equity	667,004	852,512
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,378,636	$ 1,712,500