CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net loss	$ (18,559)	$ (6,274)
Adjustments required to reconcile net loss to net cash used in operating activities:
Stock-based compensation	245	208
Depreciation	186	131
Accrued severance pay, net	9	15
Reevaluation of fair value of warrants to purchase Ordinary Shares	12,715
Increase in other accounts receivable and prepaid expenses	(33)	(34)
Decrease in deferred revenue	(315)	(375)
Increase (decrease) in trade payables	(1,553)	106
Increase (decrease) in other accounts payable and accrued expenses	(672)	334
Net cash used in operating activities	(7,977)	(5,889)
Cash flows from investing activities:
Proceeds from maturity of investments in restricted cash		191
Purchase of property and equipment	(717)	(634)
Investment in other assets	58
Net cash used in investing activities	(659)	(443)
Cash flows from financing activities:
Repayment of loan		(141)
Net cash provided by financing activities		(141)
Net decrease in cash and cash equivalents	(8,636)	(6,473)
Cash and cash equivalents at the beginning of the period	23,215	31,851
Cash and cash equivalents at the end of the period	14,579	25,378
Supplemental disclosure of non-cash investing and financing activities:
Purchase of property and equipment	31	161
Cash paid during the period:
Cash paid for interest		3
Cash paid for taxes	$ 166	$ 203