Mineral Property Expenditures - Schedule of Mineral Property Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Total expense for the period	$ 769	$ 731
Temrezli Project [Member]
Total expense for the period	98	241
Turkey Project [Member]
Total expense for the period	98	241
Kingsville Dome Project [Member]
Total expense for the period	262	234
Rosita Project [Member]
Total expense for the period	112	68
Vasquez Project [Member]
Total expense for the period	169	158
Other Project [Member]
Total expense for the period	1	22
Texas Project [Member]
Total expense for the period	544	482
Cebolleta Project [Member]
Total expense for the period		1
Juan Tafoya Project [Member]
Total expense for the period	6	7
New Mexico Project [Member]
Total expense for the period	6	8
Columbus Basin Project [Member]
Total expense for the period	117
Other Projects Nevada [Member]
Total expense for the period	4
Nevada Projects [Member]
Total expense for the period	$ 121