SHARE-BASED PAYMENTS - Narrative (Details)	3 Months Ended		12 Months Ended
	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2014 CAD / shares	Dec. 31, 2013 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted in period (in shares)			449,537	2,176,330	307,250
Number of options (in shares)	2,045,143	2,122,897	2,045,143	2,122,897	905,413		795,318
Outstanding options, weighted average exercise price (in dollars per share) | $ / shares	$ 5.69	$ 6.54	$ 5.69	$ 6.54	$ 11.66		$ 14.27
Number of exercises in period (in shares)			8,369	48,802	15,000
Shares issued for exercise of stock options (Note 15) | $			$ 18,000	$ 185,000	$ 120,000
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	6,620,515		6,620,515
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			2 years
Award exercise period			5 years
Exercisable options, weighted average remaining contractual term			3 years 6 months 29 days
Stock options granted in period (in shares)			450,000	2,170,000
Number of options (in shares)	2,150,000		2,150,000
Number of exercisable options (in shares)	1,820,000		1,820,000
Outstanding options, weighted average exercise price (in dollars per share) | $ / shares	$ 5.69		$ 5.69
Options, vested and expected to Vest, aggregate intrinsic value | $	$ 0		$ 0
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Number of RSUs granted in period (in shares)			1,210,000	270,000
Exercisable options, weighted average exercise price (in dollars per share) | (per share)	$ 2.12	3.87	$ 2.12	$ 3.87	$ 7.97	CAD 8.75
Grants in period, grant date intrinsic value (in dollars per share) | $ / shares	$ 300,000	$ 0
Unrecognized compensation costs related to unvested stock options | $			$ 80,000
Unrecognized compensation costs related to RSU awards | $			$ 840,000
Number of exercises in period (in shares)			8,369	48,802	15,000
Shares issued for exercise of stock options (Note 15) | $			$ 20,000	$ 180,000	$ 120,000
Exercisable options, intrinsic value | $	$ 10,000	$ 60,000	$ 10,000	$ 60,000	$ 20,000
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options, weighted average exercise price (in dollars per share) | $ / shares	$ 15.61	$ 32.10	$ 15.61	$ 32.10	$ 44.22		$ 44.22
Maximum | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable options, weighted average remaining contractual term			10 years