CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' DEFICIT - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands	Common Stock	Additional Paid in Capital	Deficit Accumulated	Total
Balance at Dec. 31, 2014	$ 10	$ 261,716	$ (266,885)	$ (5,159)
Balance (in shares) at Dec. 31, 2014	96,609,764			96,609,764
Increase (Decrease) in Stockholders' Equity
Common stock issued pursuant to a controlled equity "at-the-market" sales agreement		14,672		$ 14,672
Common stock issued pursuant to a controlled equity "at-the-market" sales agreement (in shares)	3,435,998
Fees and expenses related to controlled equity sales		(404)		(404)
Common stock issued in connection with exercise of stock options		1,079		1,079
Common stock issued in connection with exercise of stock options (in shares)	248,387
Common stock issued in connection with exercise of warrants		1,012		1,012
Common stock issued in connection with exercise of warrants (in shares)	189,412
Shares issued in connection with conversion of Senior Convertible Debentures	$ 1	40,988		40,989
Shares issued in connection with conversion of Senior Convertible Debentures (in shares)	13,179,712
Stock based compensation expense		7,724		7,724
Stock issued in exchange for certain intellectual property		71		71
Stock issued in exchange for certain intellectual property (in shares)	10,000
Net loss for the period			(87,053)	(87,053)
Balance at Sep. 30, 2015	$ 11	$ 326,858	$ (353,938)	$ (27,069)
Balance (in shares) at Sep. 30, 2015	113,673,273			113,673,273