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Schedule of Share-based Compensation, Stock Options, Activity (Details) (USD $)
9 Months Ended
Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning of Period 7,751,180
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning of Period $ 2.54
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term, Beginning of Period 7 years 29 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value, Beginning of Period $ 1,162,421
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (116,300)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price $ 0.81
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period (45,000)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price $ 3.05
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, End of Period 7,589,880
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, End of Period $ 2.56
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term, End of Period 6 years 4 months 20 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value, End of Period 803,911
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number, End of Period 7,108,380
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price, End of Period $ 2.61
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term, End of Period 6 years 2 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value, End of Period $ 803,911