Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Condensed Consolidated Statements Of Operations
Sales, net	$ 23,273	$ 33,669	$ 51,645	$ 64,821
Mine cost of sales:
Production costs	14,117	14,801	27,051	29,021
Depreciation and amortization	2,224	1,044	3,616	1,789
Reclamation and remediation	7		30
Total mine cost of sales	16,348	15,845	30,697	30,810
Mine gross profit	6,925	17,824	20,948	34,011
Costs and expenses:
General and administrative expenses	2,388	2,249	5,119	5,262
Exploration expenses	2,894	1,597	4,606	2,885
Total costs and expenses	5,282	3,846	9,725	8,147
Operating income	1,643	13,978	11,223	25,864
Other (expense) income, net	(543)	214	(1,047)	683
Income before income taxes	1,100	14,192	10,176	26,547
Provision for income taxes	288	6,384	4,311	11,613
Net income	$ 812	$ 7,808	$ 5,865	$ 14,934
Net income per common share:
Basic	$ 0.01	$ 0.14	$ 0.11	$ 0.28
Diluted	$ 0.01	$ 0.14	$ 0.11	$ 0.27
Weighted average shares outstanding:
Basic weighted average shares of common stock	54,179,369	54,179,369	54,179,369	54,057,822
Diluted weighted average shares of common stock	54,179,369	54,556,217	54,179,369	54,629,512