Condensed Consolidated Statements of Operations - Class of Stock [Domain] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Licensing and other revenue	$ 0	$ 0	$ 0	$ 2
Costs and expenses:
Research and development	1,126	986	2,277	1,324
General and administrative	1,682	2,035	3,984	4,576
Total costs and expenses	2,808	3,021	6,261	5,900
Loss from operations	(2,808)	(3,021)	(6,261)	(5,898)
Non-operating income (expense):
Interest expense	(65)	(116)	(166)	(268)
Derivative liability income	0	3,527	0	1,844
Other expense, net	(3)	(130)	(6)	(197)
Total non-operating income (expense)	(68)	3,281	(172)	1,379
Net income (loss) before income taxes	(2,876)	260	(6,433)	(4,519)
Income tax expense	0	0	0	0
Net income (loss)	(2,876)	260	(6,433)	(4,519)
Series C Preferred dividend	(55)	0	(114)	0
Deemed dividend	0	(672)	(1,701)	(720)
Net loss attributable to common stockholders	$ (2,931)	$ (412)	$ (8,248)	$ (5,239)
Basic and diluted net loss per common share	$ (0.12)	$ (0.03)	$ (0.34)	$ (0.37)
Weighted average number of common stock outstanding used in computing net loss per common share:
Basic and diluted net loss per common share:	24,722,980	14,470,523	24,522,788	14,108,675