Stock-Based Compensation (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Number of Options Outstanding,Begining Balance	2,979,010	2,539,091
Number of Options, Granted	2,075,000	557,002
Number of Options, Exercised	(374,851)	(23,333)
Number of Options, Forfeited	(225,413)	(93,750)
Number of Options Outstanding,Ending Balance	4,453,746	2,979,010	2,539,091
Number of Options, Balance exercisable	2,891,877
Weighted Average Exercise Price per Share, Balance	$ 1.34	$ 1.32
Weighted Average Exercise Price per Share, Granted	$ 2.21	$ 1.26
Weighted Average Exercise Price per Share, Excercised	$ 0.34	$ 0.57
Weighted Average Exercise Price per Share, Forfeited or expired	$ 2.37	$ 0.59
Weighted Average Exercise Price per Share, Balance outstanding	$ 1.78	$ 1.34	$ 1.32
Options Exercisable, Weighted Average Exercise Price	$ 1.60
Options Outstanding, Weighted Average Remaining Contractual Life	6 years 5 months 5 days	6 years 0 months 4 days	6 years 11 months 19 days
Options Exercisable, Weighted Average Remaining Contractual Life	5 years 8 months 16 days
Aggregate Intrinsic Value Outstanding,Begining Balance	$ 0	$ 1,028,000
Aggregate Intrinsic Value Outstanding,Ending Balance	1,308,000	0	1,028,000
Aggregate Intrinsic Value Excisable	1,160,000
Grant date fair value of options granted	$ 4,467,984	$ 609,000
Weighted average grant date fair value	$ 2.15	$ 1.09