Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 73,330	$ 56,664
Receivables	29,221	32,417
Inventory	52,944	51,281
Ore on leach pads	89,406	81,128
Prepaid expenses and other	14,340	13,847
Assets held for sale	0	54,240
Current assets	259,241	289,577
NON-CURRENT ASSETS
Property, plant and equipment, net	337,455	319,967
Mining properties, net	913,138	852,799
Ore on leach pads, noncurrent	73,133	73,495
Restricted assets	9,254	9,138
Equity securities	161,894	132,197
Other assets	63,086	57,249
TOTAL ASSETS	1,817,201	1,734,422
CURRENT LIABILITIES
Accounts payable	103,266	103,901
Accrued liabilities and other	82,438	87,946
Debt	29,620	29,821
Reclamation	2,853	2,931
Liabilities held for sale	0	11,269
Current liabilities	218,177	235,868
NON-CURRENT LIABILITIES
Debt	455,868	457,680
Reclamation	181,473	178,957
Deferred tax liabilities	24,647	21,969
Other long-term liabilities	37,062	39,686
Non-current liabilities	$ 699,050	$ 698,292
Common Stock, Shares, Outstanding	280,834,764	256,919,803
STOCKHOLDERS' EQUITY
Common stock, par value $0.01 per share; authorized 300,000,000 shares, 280,834,764 issued and outstanding at March 31, 2022 and 256,919,803 at December 31, 2021	$ 2,808	$ 2,569
Additional paid-in capital	3,834,896	3,738,347
Accumulated other comprehensive income (loss)	(5,970)	(1,212)
Accumulated deficit	(2,931,760)	(2,939,442)
Stockholders' equity	899,974	800,262
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,817,201	$ 1,734,422
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)	280,834,764	256,919,803