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Share-based Compensation (Details) (USD $)	3 Months Ended
Share-based Compensation (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Share-based Compensation
Stock options granted (in shares)	2,231,925	2,616,250
Weighted average grant date fair value (in dollars per share)	$ 0.68	$ 1.53
Share-based Compensation
Share-based Compensation expense	$ 437,706	$ 1,355,752
Cost of net revenues
Share-based Compensation
Share-based Compensation expense	8,434	11,994
Selling, general & administrative
Share-based Compensation
Share-based Compensation expense	301,609	971,820
Research & development
Share-based Compensation
Share-based Compensation expense	$ 127,663	$ 371,938

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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