Mineral Property Expenditures - Schedule of Mineral Property Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Total expense for the period	$ 731	$ 809
Temrezli Project Turkey [Member]
Total expense for the period	241
Total Turkey Projects [Member]
Total expense for the period	241
Kingsville Dome Project Texas [Member]
Total expense for the period	234	$ 220
Rosita Project Texas [Member]
Total expense for the period	68	108
Vasquez Project Texas [Member]
Total expense for the period	158	166
Butler Ranch Project Texas [Member]
Total expense for the period	6	58
Other Projects Texas [Member]
Total expense for the period	16	178
Total Texas Projects [Member]
Total expense for the period	482	$ 730
Cebolleta Project New Mexico [Member]
Total expense for the period	1
Juan Tafoya Project New Mexico [Member]
Total expense for the period	$ 7	$ 4
Other Projects New Mexico [Member]
Total expense for the period		75
Total New Mexico Projects [Member]
Total expense for the period	$ 8	$ 79