Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2012

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

	2012	2011
Expected dividend yield	–	0%
Risk-free interest rate	–	1.83%
Expected volatility	–	98%
Expected option life (in years)	–	4.43

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, 2011	7,751,180		2.54	7.08	1,162,421
Exercised	(116,300	)	0.81
Expired	(45,000	)	3.05
Outstanding, September 30, 2012	7,589,880		2.56	6.39	803,911
Exercisable, September 30, 2012	7,108,380		2.61	6.20	803,911

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

		Weighted Average
	Number of	Grant Date
Non-vested stock options	Options	Fair Value
		$
Non-vested at December 31, 2011 and September 30, 2012	481,500	1.37