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The Company, Basis of Presentation and Summary of Significant Accounting Policies (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock-based compensation expense recorded during period	$ 1,828,203	$ 2,648,741	$ 1,986,755
Total unrecognized compensation expense remaining	$ 4,173,830	$ 5,724,738	$ 3,031,546
Remaining average recognition period (in years)	2 years 9 months 22 days	1 year 11 months 12 days	1 year 11 months 19 days

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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