Accrued Liabilities (Schedule Of Accrued Liabilities) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Accrued Liabilities [Abstract]
Accrued salaries, bonus, and benefits	$ 2,123,167	$ 3,229,382
Accrued research and development	89,654	27,044
Accrued legal and other professional fees	219,000	25,000
Other	2,929,989	2,421,740
Total accrued liabilities	$ 5,361,810	$ 5,703,166