Stock Options, Restricted Stock and Warrants (Schedule of Options Outstanding) (Details)	3 Months Ended
	Mar. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	2,461,078
Options Outstanding Weighted Average Remaining Contractual Term	7 years 9 months 18 days
Options Exercisable Number of Options	1,433,086
Options Exercisable Weighted Average Remaining Contractual Term	7 years
$0.43 to 0.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	655,890
Options Outstanding Weighted Average Remaining Contractual Term	9 years 3 months 18 days
Options Exercisable Number of Options	111,050
Options Exercisable Weighted Average Remaining Contractual Term	9 years 3 months 18 days
1.00 to 1.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	1,441,980
Options Outstanding Weighted Average Remaining Contractual Term	7 years 10 months 24 days
Options Exercisable Number of Options	956,536
Options Exercisable Weighted Average Remaining Contractual Term	7 years 8 months 12 days
2.00 to 2.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	201,708
Options Outstanding Weighted Average Remaining Contractual Term	6 years 4 months 24 days
Options Exercisable Number of Options	204,000
Options Exercisable Weighted Average Remaining Contractual Term	6 years 4 months 24 days
3.00 to 3.99
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	51,500
Options Outstanding Weighted Average Remaining Contractual Term	3 years 3 months 18 days
Options Exercisable Number of Options	51,500
Options Exercisable Weighted Average Remaining Contractual Term	3 years 3 months 18 days
7.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding Number of Options	110,000
Options Outstanding Weighted Average Remaining Contractual Term	2 years 2 months 12 days
Options Exercisable Number of Options	110,000
Options Exercisable Weighted Average Remaining Contractual Term	2 years 2 months 12 days