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STOCK BASED COMPENSATION - Options Outstanding and Exercisable (Details) - 12 months ended Dec. 31, 2015 $ / shares in Units, $ in Millions | USD ($) $ / shares shares | CAD / shares shares | $ / shares shares
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Additional disclosures |  |  |
Number of shares remaining under agreement | shares | 319,640 |  |
Fair Value of remaining common shares outstanding payable | $ | $ 0.4 |  |
Nevada Pacific Gold Ltd. |  |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 199,143 | 199,143
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 5.11 |
Weighted Average Remaining Contractual Life | 8 months 12 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 199,143 | 199,143
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 5.11 |
Weighted Average Remaining Contractual Life | 8 months 12 days |  |
McEwen Mining Inc. |  |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 6,953,967 | 6,953,967
Weighted Average Exercise Price (in dollars per share) |  |  | $ 2.49
Weighted Average Remaining Contractual Life | 4 years 1 month 6 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 2,771,634 | 2,771,634
Weighted Average Exercise Price (in dollars per share) |  |  | $ 3.80
Weighted Average Remaining Contractual Life | 3 years 8 months 12 days |  |
$0.75 - $2.25 | McEwen Mining Inc. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 0.91 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 1.04 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 2,298,667 | 2,298,667
Weighted Average Exercise Price (in dollars per share) |  |  | $ 1.02
Weighted Average Remaining Contractual Life | 4 years 10 months 24 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 55,667 | 55,667
Weighted Average Exercise Price (in dollars per share) |  |  | $ 0.91
Weighted Average Remaining Contractual Life | 3 years |  |
$2.26 - $2.75 | McEwen Mining Inc. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 1.05 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 2.38 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 1,745,000 | 1,745,000
Weighted Average Exercise Price (in dollars per share) |  |  | $ 1.92
Weighted Average Remaining Contractual Life | 3 years 1 month 6 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 850,669 | 850,669
Weighted Average Exercise Price (in dollars per share) |  |  | $ 2.24
Weighted Average Remaining Contractual Life | 2 years 4 months 24 days |  |
$2.76 - $3.25 | McEwen Mining Inc. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 2.39 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 2.71 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 306,800 | 306,800
Weighted Average Exercise Price (in dollars per share) |  |  | $ 2.51
Weighted Average Remaining Contractual Life | 4 years 1 month 6 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 306,800 | 306,800
Weighted Average Exercise Price (in dollars per share) |  |  | $ 2.51
$3.26 - $6.50 | McEwen Mining Inc. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 2.72 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 3.09 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 1,567,500 | 1,567,500
Weighted Average Exercise Price (in dollars per share) |  |  | $ 2.90
Weighted Average Remaining Contractual Life | 3 years 7 months 6 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 522,498 | 522,498
Weighted Average Exercise Price (in dollars per share) |  |  | $ 2.90
Weighted Average Remaining Contractual Life | 3 years 7 months 6 days |  |
$6.51 - $8.31 | McEwen Mining Inc. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 3.10 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 8.30 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 1,036,000 | 1,036,000
Weighted Average Exercise Price (in dollars per share) |  |  | $ 6.09
Weighted Average Remaining Contractual Life | 4 years 8 months 12 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 1,036,000 | 1,036,000
Weighted Average Exercise Price (in dollars per share) |  |  | $ 6.09
Weighted Average Remaining Contractual Life | 4 years 8 months 12 days |  |
C$4.30 - C$4.52 | Nevada Pacific Gold Ltd. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 4.30 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 4.52 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 40,500 | 40,500
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 4.30 |
Weighted Average Remaining Contractual Life | 2 months 12 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 40,500 | 40,500
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 4.30 |
Weighted Average Remaining Contractual Life | 2 months 12 days |  |
C$4.53 - C$4.83 | Nevada Pacific Gold Ltd. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 4.53 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 4.83 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 110,343 | 110,343
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 4.74 |
Weighted Average Remaining Contractual Life | 10 months 24 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 110,343 | 110,343
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 4.74 |
Weighted Average Remaining Contractual Life | 10 months 24 days |  |
C$4.84 - C$5.81 | Nevada Pacific Gold Ltd. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 4.84 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 5.81 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 2,300 | 2,300
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 4.91 |
Weighted Average Remaining Contractual Life | 1 year 1 month 6 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 2,300 | 2,300
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 4.91 |
Weighted Average Remaining Contractual Life | 1 year 1 month 6 days |  |
C$5.82 - C$6.70 | Nevada Pacific Gold Ltd. |  |  |
Stock options outstanding and exercisable |  |  |
Range of Exercise Price, low end of range (in dollars per share) | $ 5.82 |  |
Range of Exercise Price, high end of range (in dollars per share) | $ 6.70 |  |
Options Outstanding |  |  |
Number Outstanding (in shares) | shares |  | 46,000 | 46,000
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 6.70 |
Weighted Average Remaining Contractual Life | 4 months 24 days |  |
Options Exercisable |  |  |
Number Exercisable (in shares) | shares |  | 46,000 | 46,000
Weighted Average Exercise Price (in dollars per share) | CAD / shares |  | CAD 6.70 |
Weighted Average Remaining Contractual Life | 4 months 24 days |  |

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