Quarterly report pursuant to Section 13 or 15(d)

Restricted Cash (Details Textual)

v2.4.0.8
Restricted Cash (Details Textual) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Securing Company Credit Card [Member]
 
Restricted Cash and Cash Equivalents Items [Line Items]  
Restricted Cash and Cash Equivalents $ 0.1
Surety for Completion of ARO on Mineral Properties [Member]
 
Restricted Cash and Cash Equivalents Items [Line Items]  
Restricted Cash and Cash Equivalents 26.7
Securing Surety Bonds [Member]
 
Restricted Cash and Cash Equivalents Items [Line Items]  
Restricted Cash and Cash Equivalents $ 5.0