SHARE CAPITAL AND RESERVES (Narrative) (Details) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2017 CAD ($) yr shares $ / shares	Dec. 31, 2017 USD ($) yr $ / shares shares	Dec. 31, 2016 CAD ($) yr shares $ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]
Treasury shares authorized to purchase		7,597,730
Cancellation of treasury shares	4,106,772
Maximum percentage share compensation arrangements relative to outstanding shares	8.50%
Average share price of entity \| $ / shares	$ 5.55		$ 5.55
Stock Option Incentive Plan [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Granted, options	795,000		1,336,000
Granted, options, weighted average exercise price \| $	$ 5.50		$ 4.96
Fair value of options issued \| $		$ 1.1
Fair value of option issued per option \| $ / shares		1.33
Fair value assumption used for grant date and exercise share price of issued options \| $	$ 5.50
Description of option pricing model, share options granted	Black-Scholes model
Expected volatility, share options granted	43.00%
Risk free interest rate, share options granted	1.64%
Maximum expiry date or expected life of options (years) \| yr	3
Maximum term of share options granted	5 years
Weighted average share price at time of exercise of options \| $	$ 5.69		$ 7.16
Weighted average remaining contractual life of outstanding share options \| yr		2.82	3.35
Restricted Share Rights [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Grant date fair value, RSR's \| $		$ 2.6
Shares authorized for issuance share based compensation arrangement		3,800,000
Granted	597,200
Vesting period of sharebased compensation arrangement \| yr	3
Weighted average grant date fair value per share granted related to other equity instruments \| $ / shares		$ 4.30
Number of outstanding, other equity instruments		2,222,624

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2016-01-13
-Paragraph 47
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2016-03-30&anchor=para_47_a_i&doctype=Standard
-URIDate 2016-03-31