Consolidated Statements of Changes in Convertible Preferred Stock and Stockholders' Equity (Deficiency) (USD $) In Thousands, except Share data		Total	Preferred Stock [Member]	Preferred Stock [Member] Series D Convertible Preferred Stock [Member]	Common Stock [Member]		Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]
Beginning Balance at Dec. 31, 2012		$ (37,448)	$ 37,959		$ 4		$ 2,826	$ 0	$ (40,278)
Beginning Balance, Shares at Dec. 31, 2012			14,856,481		3,848,293
Exercise of warrants to purchase Series D convertible preferred stock				5,816
Exercise of warrants to purchase Series D convertible preferred stock, Shares				225,660
Stock-based compensation expense		1,788					1,788
Exercise of stock options		127			0	[1]	127
Exercise of stock options, Shares					105,021
Net loss		(7,475)							(7,475)
Ending Balance at Dec. 31, 2013		(43,008)	43,775		4		4,741	0	(47,753)
Ending Balance, Shares at Dec. 31, 2013			15,082,141		3,953,314
Conversion of warrants to purchase common stock		2,866					2,866
Exercise of warrants to purchase common stock	[1]				0
Exercise of warrants to purchase common stock, Shares					107,217
Conversion of preferred stock to common stock upon initial public offering		43,775	(43,775)		15		43,760
Conversion of preferred stock to common stock upon initial public offering, Shares			(15,082,141)		15,082,141
Stock-based compensation expense		1,624					1,624
Exercise of stock options		30			0	[1]	30
Exercise of stock options, Shares		12,594			13,281
Issuance of common stock upon initial public offering, Value		106,071			5		106,066
Issuance of common stock upon initial public offering, Shares					5,300,436
Unrealized gains on derivative instruments		47						47
Net loss		(12,713)							(12,713)
Ending Balance at Jun. 30, 2014		$ 98,692	$ 0		$ 24		$ 159,087	$ 47	$ (60,466)
Ending Balance, Shares at Jun. 30, 2014			0		24,456,389

[1] Represents an amount lower than $ 1.