Stock Option Plans (Schedule of Options Outstanding) (Details)	9 Months Ended
	Sep. 30, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	1,439,876
Options Outstanding WA Remaining Contractual Term	7 years 9 months 18 days
Options Exercisable Number of Options	865,332
Options Exercisable WA Remaining Contractual Term	7 years
$ 1.00 to 1.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	934,876
Options Outstanding WA Remaining Contractual Term	8 years 8 months 12 days
Options Exercisable Number of Options	435,361
Options Exercisable WA Remaining Contractual Term	8 years 1 month 6 days
$ 2.00 to 2.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	287,500
Options Outstanding WA Remaining Contractual Term	7 years 9 months 18 days
Options Exercisable Number of Options	212,471
Options Exercisable WA Remaining Contractual Term	7 years 7 months 6 days
$ 3.00 to 3.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	71,000
Options Outstanding WA Remaining Contractual Term	4 years 9 months 18 days
Options Exercisable Number of Options	71,000
Options Exercisable WA Remaining Contractual Term	4 years 9 months 18 days
$ 4.00 to 4.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	11,500
Options Outstanding WA Remaining Contractual Term	3 years 10 months 24 days
Options Exercisable Number of Options	11,500
Options Exercisable WA Remaining Contractual Term	3 years 10 months 24 days
$ 7.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	135,000
Options Outstanding WA Remaining Contractual Term	3 years 8 months 12 days
Options Exercisable Number of Options	135,000
Options Exercisable WA Remaining Contractual Term	3 years 8 months 12 days