Annual report pursuant to Section 13 and 15(d)

Equity Investment (Details)

v3.3.1.900
Equity Investment (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Mar. 31, 2012
Equity Investment        
Write-off of mineral properties   $ 483 $ 1,430  
Bootheel Project Llc [Member]        
Equity Investment        
Project Expenditure Percentage 25.00%      
Equity Method Investment, Ownership Percentage       19.10%
Write-off of mineral properties $ 0      
Jet Metals | Bootheel Project Llc [Member]        
Equity Investment        
Project Expenditure Percentage 75.00%