SHAREHOLDERS' EQUITY (DEFICIT) - CONVERTIBLE PREFERRED SHARES (Details) $ / shares in Units, $ in Thousands							12 Months Ended
	Apr. 22, 2015 USD ($) shares	Mar. 25, 2015 USD ($) $ / shares shares	Mar. 01, 2015 shares	Jan. 24, 2015 USD ($) $ / shares shares	Apr. 09, 2014 USD ($) $ / shares shares	Feb. 17, 2014 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2016 shares	Feb. 28, 2015 shares
Shareholders' Deficit disclosures
Stock split ratio			7.75
Ordinary Shares, shares authorized | shares			50,000,000				50,000,000	50,000,000	5,000,000
Proceeds from issuance of Ordinary Shares, net of underwriters' fees							$ 1,308
IPO
Shareholders' Deficit disclosures
Share Price (in dollars per share) | $ / shares		$ 8.50
Issuance costs		$ 5,200
Gross consideration from issuance of Ordinary Shares		$ 40,000
Issuance of Ordinary Shares (in shares) | shares		4,700,000
Underwriters Over-Allotment Option
Shareholders' Deficit disclosures
Issuance of Ordinary Shares, net of underwriters' fees (in shares) | shares	165,452
Proceeds from issuance of Ordinary Shares, net of underwriters' fees	$ 1,308
Series E Convertible Preferred Stock Warrant
Shareholders' Deficit disclosures
Warrants issued (in shares) | shares						240,491
Exercise price of warrants (in dollars per share) | $ / shares						$ 0.001
Expiration term of warrants						7 years
Series E Preferred shares
Shareholders' Deficit disclosures
Gross proceeds from issuance of Preferred shares and warrants					$ 5,625	$ 13,608
Share Price (in dollars per share) | $ / shares				$ 8.49	$ 8.49	$ 8.49
Number of convertible preferred shares shares issued | shares					662,725	1,603,297
Issuance costs						$ 26
Proceeds from issuance of convertible preferred shares				$ 11,406
Convertible Preferred Stock issued (in shares) | shares				1,445,966