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SHARE CAPITAL (Details 4) | Dec. 31, 2017 USD ($) Numberofunits | Dec. 31, 2017 CAD ($) Numberofunits | Dec. 31, 2016 CAD ($) Numberofunits | Dec. 31, 2015 CAD ($) Numberofunits
--- | --- | --- | --- | ---
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Options outstanding - weighted average remaining contractual life (in years) | 2.4 | 2.4 |  |
Options outstanding - number of options outstanding (in shares) | Numberofunits | 13,087,000 | 13,087,000 | 14,855,000 | 16,998,000
Options outstanding - weighted average exercise price (per share) |  | $ 5.08 | $ 5.84 | $ 5.76
Options exercisable - weighted average remaining contractual life (in years) | 1.6 | 1.6 |  |
Options exercisable - number of options outstanding (in shares) | Numberofunits | 8,665,500 | 8,665,500 |  |
Options exercisable - weighted average exercise price (per share) |  | $ 5.65 |  |
3.00 - 3.99 [Member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Options outstanding - weighted average remaining contractual life (in years) | 3.5 | 3.5 |  |
Options outstanding - number of options outstanding (in shares) | Numberofunits | 4,925,400 | 4,925,400 |  |
Options outstanding - weighted average exercise price (per share) |  | $ 3.55 |  |
Options exercisable - weighted average remaining contractual life (in years) | 2.7 | 2.7 |  |
Options exercisable - number of options outstanding (in shares) | Numberofunits | 2,023,000 | 2,023,000 |  |
Options exercisable - weighted average exercise price (per share) |  | $ 3.35 |  |
3.00 - 3.99 [Member] | Bottom of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 3.00 |  |  |
3.00 - 3.99 [Member] | Top of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 3.99 |  |  |
4.00 - 4.99 [Member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Options outstanding - weighted average remaining contractual life (in years) | 2.8 | 2.8 |  |
Options outstanding - number of options outstanding (in shares) | Numberofunits | 3,985,300 | 3,985,300 |  |
Options outstanding - weighted average exercise price (per share) |  | $ 4.52 |  |
Options exercisable - weighted average remaining contractual life (in years) | 2.3 | 2.3 |  |
Options exercisable - number of options outstanding (in shares) | Numberofunits | 2,695,200 | 2,695,200 |  |
Options exercisable - weighted average exercise price (per share) |  | $ 4.64 |  |
4.00 - 4.99 [Member] | Bottom of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 4.00 |  |  |
4.00 - 4.99 [Member] | Top of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 4.99 |  |  |
5.00 - 5.99 [Member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Options outstanding - weighted average remaining contractual life (in years) | 2.5 | 2.5 |  |
Options outstanding - number of options outstanding (in shares) | Numberofunits | 622,000 | 622,000 |  |
Options outstanding - weighted average exercise price (per share) |  | $ 5.64 |  |
Options exercisable - weighted average remaining contractual life (in years) | 1.9 | 1.9 |  |
Options exercisable - number of options outstanding (in shares) | Numberofunits | 392,500 | 392,500 |  |
Options exercisable - weighted average exercise price (per share) |  | $ 5.6 |  |
5.00 - 5.99 [Member] | Bottom of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 5.00 |  |  |
5.00 - 5.99 [Member] | Top of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 5.99 |  |  |
6.00 - 6.99 [Member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Options outstanding - weighted average remaining contractual life (in years) | 1.1 | 1.1 |  |
Options outstanding - number of options outstanding (in shares) | Numberofunits | 1,269,000 | 1,269,000 |  |
Options outstanding - weighted average exercise price (per share) |  | $ 6.34 |  |
Options exercisable - weighted average remaining contractual life (in years) | 1.1 | 1.1 |  |
Options exercisable - number of options outstanding (in shares) | Numberofunits | 1,269,000 | 1,269,000 |  |
Options exercisable - weighted average exercise price (per share) |  | $ 6.34 |  |
6.00 - 6.99 [Member] | Bottom of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 6.00 |  |  |
6.00 - 6.99 [Member] | Top of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 6.99 |  |  |
7.00 - 7.99 [Member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Options outstanding - weighted average remaining contractual life (in years) | 0.1 | 0.1 |  |
Options outstanding - number of options outstanding (in shares) | Numberofunits | 1,443,800 | 1,443,800 |  |
Options outstanding - weighted average exercise price (per share) |  | $ 7.65 |  |
Options exercisable - weighted average remaining contractual life (in years) | 0.1 | 0.1 |  |
Options exercisable - number of options outstanding (in shares) | Numberofunits | 1,443,800 | 1,443,800 |  |
Options exercisable - weighted average exercise price (per share) |  | $ 7.65 |  |
7.00 - 7.99 [Member] | Bottom of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 7.00 |  |  |
7.00 - 7.99 [Member] | Top of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 7.99 |  |  |
10.00 - 10.99 [Member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Options outstanding - weighted average remaining contractual life (in years) | 0.1 | 0.1 |  |
Options outstanding - number of options outstanding (in shares) | Numberofunits | 842,000 | 842,000 |  |
Options outstanding - weighted average exercise price (per share) |  | $ 10.02 |  |
Options exercisable - weighted average remaining contractual life (in years) | 0.1 | 0.1 |  |
Options exercisable - number of options outstanding (in shares) | Numberofunits | 842,000 | 842,000 |  |
Options exercisable - weighted average exercise price (per share) |  | $ 10.02 |  |
10.00 - 10.99 [Member] | Bottom of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 10.00 |  |  |
10.00 - 10.99 [Member] | Top of range [member] |  |  |  |
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |  |  |  |
Exercise price (per share) | $ 10.99 |  |  |

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