Derivative Financial Instruments (Details 2) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended			86 Months Ended
	Nov. 30, 2011	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
Changes in warrants
Balance at the beginning of the period (in shares)		2,377,660	2,377,660	2,265,160	2,265,160	1,510,134	1,469,676	938,469	728,469	2,265,160	728,469
Fair value of new warrants issued during the quarter (in shares)						1,810,294	40,458	611,207	210,000
Reclassification of derivative liability to equity during the quarter (in shares)		(112,500)				(1,055,268)
Exercise of warrants during the quarter (in shares)								(80,000)
Warrants classified to derivative liability during quarter (in shares)				112,500
Balance at the end of the period (in shares)		2,265,160	2,377,660	2,377,660	2,265,160	2,265,160	1,510,134	1,469,676	938,469	2,265,160	2,265,160	728,469	2,265,160
Changes in derivative instrument liability
Balance at the beginning of the period		$ 4,663,000	$ 4,803,000	$ 3,317,000	$ 3,325,000	$ 3,861,000	$ 7,959,000	$ 5,139,000	$ 3,487,000	$ 3,325,000	$ 3,487,000
Fair value of new warrants issued during the quarter						3,082,000	285,000	2,608,000	1,313,000
Exercise of warrants during the quarter								(486,000)
Warrants classified to derivative liability during quarter				169,000
Change in fair value of derivative instruments-warrants		764,000	(140,000)	1,317,000	(8,000)	(1,911,000)	(4,383,000)	698,000	339,000	1,933,000	(5,257,000)	(297,000)	(3,621,000)
Reclassification of derivative liability to equity during the quarter		(169,000)				(1,707,000)
Balance at the end of the period		$ 5,258,000	$ 4,663,000	$ 4,803,000	$ 3,317,000	$ 3,325,000	$ 3,861,000	$ 7,959,000	$ 5,139,000	$ 5,258,000	$ 3,325,000	$ 3,487,000	$ 5,258,000
Reverse stock split ratio	0.5