Derivative Financial Instruments (Details 3) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended			98 Months Ended
	Nov. 30, 2011	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Changes in warrants
Balance at the end of the period (in shares)		5,647,203								5,647,203			5,647,203
Changes in derivative instrument liability
Balance at the beginning of the period					$ 5,258,000				$ 3,325,000	$ 5,258,000	$ 3,325,000
Change in fair value of warrants during the quarter		484,000	77,000	(1,803,000)	1,093,000	764,000	(140,000)	1,317,000	(8,000)	(149,000)	1,933,000	(5,257,000)	(3,770,000)
Balance at the end of the period		1,534,000				5,258,000				1,534,000	5,258,000	3,325,000	1,534,000
Reverse stock split ratio	0.5
Derivative instrument liability | Warrants
Changes in warrants
Balance at the beginning of the period (in shares)		858,469	858,469	2,265,160	2,265,160	2,377,660	2,377,660	2,265,160	2,265,160	2,265,160	2,265,160
Warrants classified to derivative liability during quarter (in shares)								112,500
Reclassification of derivative liability to equity during the quarter (in shares)				(1,406,691)		(112,500)
Balance at the end of the period (in shares)		858,469	858,469	858,469	2,265,160	2,265,160	2,377,660	2,377,660	2,265,160	858,469	2,265,160		858,469
Changes in derivative instrument liability
Balance at the beginning of the period		1,050,000	973,000	6,351,000	5,258,000	4,663,000	4,803,000	3,317,000	3,325,000	5,258,000	3,325,000
Warrants classified to derivative liability during quarter								169,000
Reclassification of derivative liability to equity during the quarter				(3,575,000)		(169,000)
Change in fair value of warrants during the quarter		484,000	77,000	(1,803,000)	1,093,000	764,000	(140,000)	1,317,000	(8,000)
Balance at the end of the period		$ 1,534,000	$ 1,050,000	$ 973,000	$ 6,351,000	$ 5,258,000	$ 4,663,000	$ 4,803,000	$ 3,317,000	$ 1,534,000	$ 5,258,000		$ 1,534,000