Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 8,956	$ 6,767
Restricted cash	70	21
Other current assets	288	99
Total current assets	9,314	6,887
Property and equipment, net	56	41
In-process research and development acquired	27,500	27,500
Intangible assets, net	3,187	3,415
Security deposits	199	21
Total assets	40,256	37,864
Current liabilities
Accounts payable	1,248	1,243
Accrued expenses	1,526	4,133
Due to related parties	0	30
Derivative financial instruments, warrants	192	0
Notes and loans payable, current portion, net of discount	391	2,011
Total current liabilities	3,357	7,417
Grants payable	465	469
Notes and loans payable, net of current portion and debt discount	3,271	1,564
Series D preferred stock derivative liability	7,646	0
Deferred tax liability	10,870	10,870
Total liabilities	25,609	20,320
Series D preferred stock, net of discount of $630, par value $0.0001, 12,000 shares authorized, 1,263 shares issued and 1,163 shares outstanding as of September 30, 2015 and 0 shares issued and outstanding as of December 31, 2014	$ 2,082	$ 0
Commitments and contingencies
Stockholders' Equity
Common stock, $0.0001 par value; authorized 225,000,000 shares; 28,907,278 and 23,975,358 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	$ 3	$ 2
Additional paid-in capital	68,980	62,550
Accumulated deficit	(56,421)	(45,829)
Total stockholders' equity	12,565	17,544
Total liabilities and stockholders' equity	40,256	37,864
Series C Preferred Stock [Member]
Stockholders' Equity
Preferred Stock, Value, Issued	3	821
Undesignated preferred stock [Member]
Stockholders' Equity
Preferred Stock, Value, Issued	$ 0	$ 0