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STOCK-BASED COMPENSATION (Details 2)
 6 Months Ended
Jun. 30, 2012
$0.00-$2.00
McEwen Mining
USD ($)
Jun. 30, 2012
$2.01-$4.00
McEwen Mining
USD ($)
Jun. 30, 2012
$4.01-$6.00
McEwen Mining
USD ($)
Jun. 30, 2012
$6.01-$8.31
McEwen Mining
USD ($)
Jun. 30, 2012
C$0.00-C$5.00
Nevada Pacific Gold Ltd.
CAD
Jun. 30, 2012
C$5.01-C$6.70
Nevada Pacific Gold Ltd.
CAD
Jun. 30, 2012
C$0.00-C$2.22
Minera Andes
CAD
Jun. 30, 2012
C$2.23-C$3.02
Minera Andes
CAD
Stock options outstanding and exercisable                
Range of Exercise Price, low end of range (in dollars per share) $ 0.00 $ 2.01 $ 4.01 $ 6.01 0.00 5.01 0.00 2.23
Range of Exercise Price, high end of range (in dollars per share) $ 2.00 $ 4.00 $ 6.00 $ 8.31 5.00 6.70 2.22 3.02
Options Outstanding                
Number Outstanding 1,389,000 1,054,000 366,500 925,166 271,543 123,050 310,500 525,150
Weighted Average Exercise Price (in dollars per share) $ 1.07 $ 2.57 $ 5.66 $ 7.20 4.54 5.96 1.61 2.40
Weighted Average Remaining Contractual Life 6 years 5 months 5 days 6 years 3 months 29 days 8 years 9 months 8 years 3 months 25 days 3 years 9 months 4 days 2 years 6 months 4 days 1 year 7 months 6 days 2 years 6 months 22 days
Options Exercisable                
Number Exercisable 1,389,000 847,334 66,500 363,830 271,543 123,050 297,000 377,101
Weighted Average Exercise Price (in dollars per share) $ 1.07 $ 2.59 $ 5.01 $ 7.35 4.54 5.96 1.62 2.45
Weighted Average Remaining Contractual Life 6 years 5 months 5 days 6 years 7 days 4 years 11 months 12 days 7 years 8 months 19 days 3 years 9 months 4 days 2 years 6 months 4 days 1 year 6 months 25 days 2 years 5 months 8 days