CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $)	Common Stock [Member]	Additional Paid-In capital [Member]	Deficit Accumulated During The Development Stage [Member]	Total
Balance at Dec. 31, 2011	$ 6,203	$ 216,984,108	$ (183,325,501)	$ 33,664,810
Balance (in shares) at Dec. 31, 2011	62,034,146
Stock-based compensation	0	1,281,688	0	1,281,688
Sale and issuance of common stock in January 2012 at approximately $4.44 per share, net of issuance costs	499	22,151,352	0	22,151,851
Sale and issuance of common stock in January 2012 at approximately $4.44 per share, net of issuance costs (in shares)	4,989,275			4,989,275
Common stock issued in 2012 at par, pursuant to net-share (cashless) exercises of common stock warrants	2	(2)	0	0
Common stock issued in 2012 at par, pursuant to net-share (cashless) exercises of common stock warrants (in shares)	17,148
Net loss	0	0	(23,431,502)	(23,431,502)
Balance at Jun. 30, 2012	$ 6,704	$ 240,417,146	$ (206,757,003)	$ 33,666,847
Balance (in shares) at Jun. 30, 2012	67,040,569