Condensed Consolidated Statements of Cash Flows - Class of Stock [Domain] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net loss	$ (6,433)	$ (4,519)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	159	172
Share-based compensation	1,733	2,910
Common shares issued for services	280	0
Derivative liability income	0	(1,994)
Amortization of discount on debt	9	186
Changes in operating assets and liabilities:
Increase (decrease) in other current assets	39	(38)
Increase in security deposits	(110)	0
Increase (decrease) in accounts payable	1,461	(1,889)
Decrease in due to related parties	0	(348)
Decrease in accrued expenses	(1,560)	(1,102)
Increase in long term grants payable	0	10
Net cash used in operating activities	(4,422)	(6,462)
Cash flows from investing activities:
(Increase) decrease in restricted cash	(40)	161
Purchase of property and equipment	(27)	(24)
Purchase of intangible assets	0	(111)
Net cash (used in) provided by investing activities	(67)	26
Cash flows from financing activities:
Proceeds received from exercise of options	95	0
Proceeds received from March 2014 financing	0	10,171
Proceeds received from deposits for future financing	0	(116)
Issuance of short-term loan	0	269
Repayment of loans	(976)	(758)
Net cash (used in) provided by financing activities	(881)	9,566
Increase (decrease) in cash and cash equivalents	(5,370)	3,130
Cash and cash equivalents at beginning of period	6,767	49
Cash and cash equivalents at end of period	1,397	3,179
Supplemental disclosure of cash flow information:
Cash paid for interest	166	217
Supplemental disclosure of non-cash financing activities:
Accrued dividends on Series C Preferred Stock	114	0
Dividends settled in common stock	55	0
Conversion of Series C Preferred Stock into common stock	149	0
Services expensed and accrued in 2014 and settled in common stock in 2015	258	0
Issuance of Series C Preferred Stock	0	3,096
Amendment of Series C Preferred Stock	0	1,887
Reclassification of Series C Preferred Stock due to amendment	0	1,209
Deemed dividend	$ (1,701)	$ (720)