CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues:
Research and other	$ 68	$ 236
Total revenues	68	236
Operating costs and expenses:
Research and development	5,035	13,440
General and administrative	3,005	3,335
Legal expenses	3,932	940
Total operating costs and expenses	11,972	17,715
Loss from operations	(11,904)	(17,479)
Other income (expense):
Change in fair value of derivative liability	1,439	13,525
Loss from extinguishment of debt	(1,535)	0
Interest expense	(1,194)	(718)
Foreign currency transaction gain (loss)	574	(1,434)
Net loss	$ (12,620)	$ (6,106)
Net loss per share applicable to common stockholders - basic and diluted (in dollars per share)	$ (0.08)	$ (0.06)
Weighted average shares used in computing basic and diluted loss per share (in shares)	161,498	97,688