Remediation Liability and Asset Retirement Obligation (Details Textual)	3 Months Ended
	Mar. 31, 2016
Maximum [Member]
Remediation liability and asset retirement obligation (Textual)
Risk free interest rate	10.00%
Estimated useful lives of mine property	12 years
Minimum [Member]
Remediation liability and asset retirement obligation (Textual)
Risk free interest rate	8.00%
Estimated useful lives of mine property	5 years