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Derivative Instruments (Tables)
12 Months Ended
Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Adjustment of fair values liability
    Black Scholes model
 

Warrant

Liability

(in thousands)

Life

(months)

Stock price

Per share

Volatility

(%)

Risk-

Free interest rate

  Ending balance December 31, 2012 $1,138  32 1.68 62 0.35
   Loss (gain) on warrant liability (998)        
  Ending balance December 31, 2013 $  140  20 0.85 55 0.38
   Loss (gain) on warrant liability (85)        
  Ending balance December 31, 2014 $    55  8 0.92 57 0.19
Liabilities on derivative instruments
  (in thousands)

KGC

February

2013

$11 call

KGC

February

2014

$7 call

KGC

February

2014

$8 call

KGC

May

2014

$5 call

KGC

May

2014

$6 call

 Shares of Kinross 100  100  50  30  100 
  Ending liability balance December 31,2012 $    3  $   -    $  -    $   -    $   -   
   Sale of call -    55  35  -    -   
   (Gain) on derivative instrument (3) (53) (34) -    -   
  Ending liability balance December 31,2013 $   -    $   2  $   1  $   -    $   -   
   Sale of call -        16  20 
   (Gain) on derivative instrument -    (2) (1) (16) (20)
  Ending liability balance December 31,2014 $   -    $   -    $   -    $   -    $   -   
Fair value derivative instruments
  Derivatives
(in thousands) Balance Sheet Location December 31, 2014 December 31, 2013
Derivatives not designated as hedging instruments under ASC 815      
 RMB warrants Long-term liabilities $55  $140 
 Kinross calls Other current liabilities $  -   $    3