Quarterly report pursuant to Section 13 or 15(d)

Mineral Properties - rollforward (Details)

v3.5.0.2
Mineral Properties - rollforward (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
USD ($)
Balance at beginning of period $ 50,610
Increase in reclamation costs 150
Write-of of mineral properties (note 7) (62)
Amortization (2,226)
Balance at end of period 48,472
Lost Creek Property  
Balance at beginning of period 16,662
Increase in reclamation costs 338
Amortization (2,226)
Balance at end of period 14,774
Other Us Properties [Member]  
Balance at beginning of period 13,210
Write-of of mineral properties (note 7) (62)
Balance at end of period 13,148
Path Finder Mines [Member]  
Balance at beginning of period 20,738
Increase in reclamation costs (188)
Balance at end of period $ 20,550