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Share-based Compensation (Details 2) (USD $)	12 Months Ended
Share-based Compensation (Details 2) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation
Share-based Compensation expense	$ 4,830,831	$ 5,379,961	$ 2,813,816
Cost of Sales
Share-based Compensation
Share-based Compensation expense	47,371	54,454	75,876
Selling, General & Administrative
Share-based Compensation
Share-based Compensation expense	3,400,978	3,845,116	1,930,529
Research & Development
Share-based Compensation
Share-based Compensation expense	$ 1,382,482	$ 1,480,391	$ 807,411

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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