Accrued Liabilities (Schedule Of Accrued Liabilities) (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Accrued Liabilities [Abstract]
Accrued salaries, bonus, and benefits	$ 2,333,502	$ 3,229,382
Accrued research and development	34,586	27,044
Accrued legal and other professional fees	140,662	25,000
Other	2,807,641	2,421,740
Total accrued liabilities	$ 5,316,391	$ 5,703,166