Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 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
Expired	(168,000	)	3.14
Outstanding, March 31, 2013	9,057,880		2.32	6.26	384,350
Exercisable, March 31, 2013	7,850,830		2.45	5.80	384,350

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 and March 31, 2013	1,207,050	1.25