CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Loss	$ (31,529)	$ (12,237)
Adjustments to reconcile loss to net cash used in operating activities:
Depreciation	181	162
Loss from disposal of property and equipment	18	0
Stock-based compensation related to options, warrants and restricted shares granted to employees, directors and consultants	7,638	4,883
Change in fair value of warrants classified as a liability	1,370	(574)
Accrued severance pay, net	(103)	(439)
Exchange differences on a restricted lease deposit and on long term loan	0	(1)
Changes in operating assets and liabilities:
Accounts receivable and prepaid expenses	(780)	(308)
Trade payables	355	(510)
Other accounts payable and accrued expenses	5,972	420
Restricted lease deposits	0	14
Net cash used in operating activities	(16,878)	(8,590)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(113)	(289)
Net cash used in investing activities	(113)	(289)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of options and warrants	1,428	1,229
Deferred costs	0	(34)
Net cash provided by financing activities	1,428	1,195
Decrease in cash and cash equivalents	(15,563)	(7,684)
Balance of cash and cash equivalents at the beginning of the period	33,288	22,390
Balance of cash and cash equivalents at the end of the period	17,725	14,706
Supplemental disclosure of cash flow information:
Cash paid during the period for taxes	11	8
Classification of liability in respect of warrants to additional paid in capital	1,982	0
Supplemental disclosure of non-cash flow information:
Deferred issuance costs	$ 278	$ 0