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SHAREHOLDERS' EQUITY (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 $ / shares shares | Jun. 30, 2016 $ / shares | Jun. 30, 2017 USD ($) $ / shares shares | Jun. 30, 2016 USD ($) $ / shares shares | Dec. 31, 2016 shares
Common stock issued | shares | 312,277,000 |  | 312,277,000 |  | 299,570,000
Exercise of stock options | $ |  |  | $ 47 | $ 1,873 |
Return of capital distribution | $ |  |  | $ 1,498 | $ 1,491 |
Semi-annual return of capital payable (in dollars per share) | $ / shares | 0.005 | 0.005 | 0.005 | 0.005 |
Common Stock |  |  |  |  |
Shares of common stock issued upon exercise of stock options | shares |  |  | 20,000 | 812,000 |
Weighted average exercise price of stock options (in dollars per share) | $ / shares |  |  | $ 2.34 | $ 2.33 |
Exercise of stock options | $ |  |  | $ 47 | $ 1,873 |
Return of capital distribution | $ |  |  | $ 1,498 | $ 1,491 |
Share repurchase program (in shares) | shares |  |  |  | 558,000 |
Lexam | Common Stock |  |  |  |  |
Common stock issued | shares | 12,687,035 |  | 12,687,035 |  |

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