Stock Option Plans (Schedule of Options Outstanding) (Details)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	2,288,076
Options Outstanding WA Remaining Contractual Term	8 years 4 months 24 days
Options Exercisable Number of Options	925,759
Options Exercisable WA Remaining Contractual Term	6 years 10 months 24 days
$ 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	1,783,076
Options Outstanding WA Remaining Contractual Term	9 years 1 month 6 days
Options Exercisable Number of Options	488,913
Options Exercisable WA Remaining Contractual Term	8 years
$ 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 7 months 6 days
Options Exercisable Number of Options	219,346
Options Exercisable WA Remaining Contractual Term	7 years 4 months 24 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 7 months 6 days
Options Exercisable Number of Options	71,000
Options Exercisable WA Remaining Contractual Term	4 years 7 months 6 days
$ 4.29 [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 7 months 6 days
Options Exercisable Number of Options	11,500
Options Exercisable WA Remaining Contractual Term	3 years 7 months 6 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 4 months 24 days
Options Exercisable Number of Options	135,000
Options Exercisable WA Remaining Contractual Term	3 years 4 months 24 days