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Mineral Property - Mineral Property Investment in Mineral Property (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
La Promesa (Peru)
Exploration	$ 5	$ 5
Norcan (Mexico)
Exploration	6	6
Aconchi (Mexico)
Exploration	5	5
Canta Colorado (Peru)
Exploration	$ 3	$ 3

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