CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 26	$ 127	$ 316	$ 532
Operating expenses:
General and administrative	1,172	1,327	2,584	2,620
Research and development	568	675	1,305	1,323
Total operating expenses	1,740	2,002	3,889	3,943
Operating loss	(1,714)	(1,875)	(3,573)	(3,411)
Other income/(expense):
Change in fair value of warrant liabilities	765		765
Financing expense	(250)		(250)
Interest and other income, net	4	6	3	13
Total other income, net	519	6	518	13
Net loss	$ (1,195)	$ (1,869)	$ (3,055)	$ (3,398)
Basic and diluted net loss per share (in dollars per share)	$ (0.06)	$ (0.11)	$ (0.16)	$ (0.21)
Shares used in computation of basic and diluted net loss per share (in shares)	20,385	16,540	18,833	16,540
Comprehensive Loss:
Net loss	$ (1,195)	$ (1,869)	$ (3,055)	$ (3,398)
Unrealized holding gain/(loss) on securities available for sale		(6)	5	2
Comprehensive loss	$ (1,195)	$ (1,875)	$ (3,050)	$ (3,396)