Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

				Weighted-
			Weighted	Average
			Average	Remaining	Aggregate
	Number of		Exercise	Contractual	Intrinsic
	Options		Price	Term (years)	Value
			$		$
Outstanding, December 31, 2012	9,225,880		2.33
Granted	1,295,000		1.20
Exercised	(37,500	)	0.68
Expired	(263,000	)	2.86
Outstanding, September 30, 2013	10,220,380		2.18	6.05	152,800
Exercisable, September 30, 2013	8,344,330		2.37	5.39	152,500

Schedule of Share-based Compensation, Non-vested Stock Options, Activity [Table Text Block]

			Weighted
	Number		Average
	of		Grant Date
Non-vested stock options	Options		Fair Value
			$
Non-vested at December 31, 2012	1,207,050		1.24
Granted	1,295,000		0.94
Vested	(638,000	)	0.83
Expired	(12,000	)	1.25
Non-vested at September 30, 2013	1,876,050		1.20