Condensed consolidated statements of operations and comprehensive loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating expenses
Research and development	$ 3,687	$ 5,323	$ 11,873	$ 11,754
General and administrative	1,230	987	3,874	2,803
Total operating expenses	4,917	6,310	15,747	14,557
Other income (expenses)
Bank charges and financing costs	(4)	(2)	(15)	(459)
Change in fair value of derivative liabilities (Note 7)	(76)	29	(70)	958
Amortization and extinguishment of remaining discount on preferred shares upon conversion of preferred shares				(1,884)
Other income (expenses)	(38)	(1)	(365)	5
Total other income (expenses)	(118)	26	(450)	(1,380)
Net loss before income taxes	(5,035)	(6,284)	(16,197)	(15,937)
Net loss	$ (5,035)	$ (6,284)	$ (16,197)	$ (15,937)
Net loss per common stock - basic and diluted (Note 6)	$ (0.43)	$ (0.59)	$ (1.46)	$ (1.97)
Basic and diluted weighted average common stock outstanding (Note 6)	11,841,147	10,695,042	11,096,369	7,984,052
Comprehensive loss:
Net loss	$ (5,035)	$ (6,284)	$ (16,197)	$ (15,937)
Other comprehensive (loss) income - unrealized (loss)/gain on available for sale securities	(1)	6	7	7
Comprehensive loss	$ (5,036)	$ (6,278)	$ (16,190)	$ (15,930)