Condensed Statements of Operations (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net revenues		$ 9		$ 19	$ 34
Operating expenses:
Research and development	[1]	1,339	$ 1,361	2,644	3,468
General and administrative	[1]	885	804	1,835	1,677
Total operating expenses		2,224	2,165	4,479	5,145
Operating loss		(2,215)	(2,165)	(4,460)	(5,111)
Other income (expense)
Interest income, net		4	1	11	2
Other income (expense), net		(1)	(2)	6	(2)
Total other income (expense)		3	(1)	17
Net loss		(2,212)	(2,166)	(4,443)	(5,111)
Series A and Series A-1 convertible preferred stock dividends			(24)		(209)
Net loss applicable to common stockholders		$ (2,212)	$ (2,190)	$ (4,443)	$ (5,320)
Net loss per common share applicable to common stockholders:
Basic and diluted		$ (0.34)	$ (0.50)	$ (0.68)	$ (1.56)
Weighted average common shares: basic and diluted		6,534,846	4,419,058	6,534,846	3,403,346

[1] Non-cash stock-based compensation expenses included in operating expenses are as follows: Research and development $ 88 $ 203 $ 160 $ 378 General and administrative 139 244 361 480