Property, Plant and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2014

Property, Plant and Equipment, Net

Schedule of components of property, plant and equipment

	June 30,			December 31,
	2014			2013
	(in thousands)
Mineral properties	$	22,397		$	22,397
Exploration properties	2,993			2,993
Royalty properties	200			200
Buildings	2,357			2,349
Mining equipment and machinery	19,416			19,441
Other furniture and equipment	841			1,054
Asset retirement cost	2,002			2,087
	50,206			50,521
Less: Accumulated depreciation and amortization	(19,567		)	(18,146		)