CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss	$ (23,437)	$ (18,422)
Adjustments required to reconcile net loss to net cash used in operating activities:
Stock-based compensation	599	382
Depreciation	481	277
Impairment of property and equipment		154
Accrued severance pay, net	6	(2)
Amortization of discount on loan	4	8
Allocation of issuance costs related to warrants to purchase Ordinary Shares	784
Revaluation of fair value of warrants to purchase Convertible Preferred Shares		(40)
Revaluation of fair value of warrants to purchase Ordinary Shares	1,507
Decrease (increase) in other accounts receivable and prepaid expenses	107	(195)
Increase (decrease) in deferred revenue	(745)	2,561
Increase in trade payables	1,258	655
Increase (decrease) in other accounts payable and accrued expenses	650	(632)
Net cash used in operating activities	(18,786)	(15,254)
Cash flows from investing activities:
Proceeds from maturity of investment in restricted cash	308	527
Purchase of property and equipment	(1,158)	(1,326)
Investment in other assets	(62)	(21)
Net cash used in investing activities	(912)	(820)
Cash flows from financing activities:
Proceeds from issuance of Convertible Preferred Shares and warrants, net of issuance costs		11,406
Proceeds from issuance of Ordinary Shares, net of issuance costs upon IPO		36,159
Proceeds from issuance of Ordinary Shares, net of underwriters' fees		1,308
Proceeds from issuance of Ordinary Shares and warrants, net of issuance costs	19,585
Repayment of loan	(234)	(422)
Proceeds from exercise of options into Ordinary Shares		145
Net cash provided by financing activities	19,351	48,596
Net increase (decrease) in cash and cash equivalents	(347)	32,522
Cash and cash equivalents at the beginning of the period	31,851	6,167
Cash and cash equivalents at the end of the period	31,504	38,689
Supplemental disclosure of non-cash investing and financing activities:
Purchase of property and equipment	286	109
Conversion of Convertible Preferred Shares into Ordinary Shares		47,075
Conversion of warrants to purchase Convertible Preferred Shares into Ordinary Shares		5,945
Non-cash deferred IPO costs		1,463
Conversion of Warrants to purchase Convertible Preferred Shares into Warrants to purchase Ordinary Shares		87
Cash paid during the period:
Cash paid for interest	3	25
Cash paid for taxes	$ 341	$ 278