Schedule of Property, Plant and Equipment, Estimated Useful Life (Details)	9 Months Ended
	Mar. 31, 2015
Leasehold Improvements [Member]
Property, Plant and Equipment, Useful Life	3 years
Office furniture and equipment [Member]
Property, Plant and Equipment, Useful Life	3 years
Mine processing equipment and buildings [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	7 years
Mine processing equipment and buildings [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	20 years
Plant [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Plant [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	9 years
Tailings [Member]
Property, Plant and Equipment, Useful Life	3 years
Environmental and permits [Member]
Property, Plant and Equipment, Useful Life	7 years
Asset retirement obligation [Member]
Property, Plant and Equipment, Useful Life	5 years
Automotive [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Automotive [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life	5 years
Software [Member]
Property, Plant and Equipment, Useful Life	5 years