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3. Summary of Significant Accounting Policies (Details 4) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Summary Of Significant Accounting Policies Details 4
Research and development	$ 4,836	$ 2,618
Selling and marketing	3,668	3,113
General and administrative	10,536	3,137
Total stock-based compensation expense	$ 19,040	$ 8,868

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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