Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

Non-cash employee compensation expense recognized in general and administrative expense in the statements of operations with respect to our non-cash employee compensation plans are as follows:

	For the three months ended March 31,
	2013		2012
Total stock compensation expense	$	1,694	$	2,579

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Fair values of options granted in the first three months of 2013 and 2012 were based on the assumptions noted in the following table:

	For the three months ended March 31,
	2013	2012
Expected volatility	56.11 to 68.19%	67.07 to 87.50%
Risk-free interest rate	1.17 to 1.62%	0.36 to 0.84%
Expected lives	3 to 7 years	4 to 7 years
Dividend yield	0%	0%

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]

A summary of option activity under the Plan during the three months ended March 31, 2013:

	Options (‘000)		Weighted– Average Exercise price (Cdn$)	Weighted– Average Remaining Contractual Term (Years)	Aggregate intrinsic  value Cdn($000)
Outstanding as of December 31, 2012	12,337		2.74	6.2	541
Granted	2,694		1.71	6.2	—
Exercised	(90	)	1.70	5.9	18
Forfeited, canceled and expired	(751	)	2.85	5.2	—
Outstanding as of March 31, 2013	14,190		2.55	6.0	223
Exercisable as of March 31, 2013	9,996		2.81	5.9	117

Schedule of Share-based Compensation, Activity

A summary of the DSU activity during the three months ended March 31, 2013:

	Number of Deferred Share Units
As of December 31, 2012	388,059
Grants	112,654
Exercises	—
As of March 31, 2013	500,713

Schedule of Share-based Compensation, Stock Appreciation Rights Award Activity

A summary of the SARs activity during the three months ended March 31, 2013:

	Number of SARs ('000)
As of December 31, 2012	1,079
Grants	1,940
Exercises	—
Canceled	(87	)
As of March 31, 2013	2,932