Quarterly report pursuant to Section 13 or 15(d)

Stock Based Payment Arrangements (Details)

Stock Based Payment Arrangements (Details) (USD $)	3 Months Ended		9 Months Ended
Stock Based Payment Arrangements (Details) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Stock-based compensation on all employee and non-employee awards
Total stock based compensation expense	$ 799,391	$ 212,135	$ 1,057,218	$ 1,058,327
Research and Development [Member]
Stock-based compensation on all employee and non-employee awards
Total stock based compensation expense	105,858	32,590	116,726	107,731
Selling, General and Administrative [Member]
Stock-based compensation on all employee and non-employee awards
Total stock based compensation expense	$ 693,533	$ 179,545	$ 940,492	$ 950,596

- Definition

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.

+ References + Details