Property, Plant, Equipment and Mineral Interests (Tables)

3 Months Ended

Mar. 31, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

	Land			Mineral property interest and claims		Mine development		Machinery and equipment			Buildings and infrastructure			Construction in progress			Interest capitalized		Total
Cost
At December 31, 2017	$	3,969		$	5,280	$	50,773	$	70,066		$	28,397		$	54		$	5,886	$	164,425
Additions		173			5		492		-			-			6,902			-		7,572
Transfers		(5	)		550		711		5,375			48			(6,679	)		-		-
Disposals		-			-		-		(213	)		-			-			-		(213	)
At December 31, 2018	$	4,137		$	5,835	$	51,976	$	75,228		$	28,445		$	277		$	5,886	$	171,784
Additions		132			-		416		89			-			1,862			-		2,499
Disposals		-			-		-		-			(50	)		-			-		(50	)
At March 31, 2019	$	4,269		$	5,835	$	52,392	$	75,317		$	28,395		$	2,139		$	5,886	$	174,233
Accumulated depreciation and depletion
At December 31, 2017	$	-		$	328	$	3,415	$	13,353		$	5,010		$	-		$	471	$	22,577
Additions		-			278		2,682		7,789			2,357			-			430		13,536
Disposals		-			-		-		(147	)		-			-			-		(147	)
At December 31, 2018	$	-		$	606	$	6,097	$	20,995		$	7,367		$	-		$	901	$	35,966
Additions		-			55		772		1,981			582			-			108		3,498
At March 31, 2019	$	-		$	661	$	6,869	$	22,976		$	7,949		$	-		$	1,009	$	39,464
Carrying values
At December 31, 2018	$	4,137		$	5,229	$	45,879	$	54,233		$	21,078		$	277		$	4,985	$	135,818
At March 31, 2019	$	4,269		$	5,174	$	45,523	$	52,341		$	20,446		$	2,139		$	4,877	$	134,769