STATEMENTS OF CHANGES IN SHAREHOLDERS' DEFICIT - 6 months ended Jun. 30, 2015 - USD ($) $ in Thousands	Common Stock	Additional paid-in capital	Deficit accumulated during the development stage	Total
Balance, beginning at Dec. 31, 2014	$ 2	$ 2,007	$ (38,330)	$ (36,321)
Balance, beginning (in shares) at Dec. 31, 2014	502,224
Increase (decrease) in Stockholders' Equity
Exercise of options into Ordinary Shares		145		145
Exercise of options into Ordinary Shares (in shares)	51,716
Conversion of Convertible Preferred Shares into Ordinary Shares upon IPO	$ 18	47,057		47,075
Conversion of Convertible Preferred Shares into Ordinary Shares upon IPO (in shares)	7,464,320
Conversion of warrants to purchase Convertible Preferred Shares into Ordinary Shares	$ 2	5,943		5,945
Conversion of warrants to purchase Convertible Preferred Shares into Ordinary Shares (in shares)	697,443
Conversion of warrants to purchase Convertible Preferred Shares into warrants to purchase Ordinary Shares		87		87
Issuance of Ordinary Shares, net of issuance costs of $5,256, upon IPO	$ 12	34,684		34,696
Issuance of Ordinary Shares, upon IPO (in shares)	4,700,000
Issuance of Ordinary Shares, net of underwriters' fees of $98		1,308		1,308
Issuance of Ordinary Shares, net of underwriters' fees (in shares)	165,452
Stock-based compensation		214		214
Net loss			(12,481)	(12,481)
Balance, ending at Jun. 30, 2015	$ 34	$ 91,445	$ (50,811)	$ 40,668
Balance, ending (in shares) at Jun. 30, 2015	13,581,155