SHAREHOLDERS' EQUITY - PRIVATE PLACEMENT(Details) $ in Thousands					12 Months Ended
	Aug. 04, 2017 USD ($)	Apr. 25, 2017 USD ($) director	Aug. 04, 2016 USD ($) director	Jul. 29, 2016 ₪ / shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 ₪ / shares shares	Apr. 20, 2017 ₪ / shares	Apr. 20, 2017 USD ($) $ / shares shares	Dec. 31, 2016 ₪ / shares shares	Jul. 29, 2016 USD ($) $ / shares shares
SHAREHOLDERS' EQUITY
Ordinary Shares, shares authorized | shares							50,000,000			50,000,000
Ordinary share, nominal value (in dollars per share) | ₪ / shares							₪ 0.01			₪ 0.01
Proceeds from exercise of warrants into Ordinary Shares					$ 4,866
Issuance costs, upon issuance of Ordinary shares in a private placement					$ 1,449	$ 1,748
Private placement | Ordinary shares and warrants to purchase ordinary shares
SHAREHOLDERS' EQUITY
Net proceeds from Issuance of Shares and Warrants		$ 28,110
Issuance costs, upon issuance of Ordinary shares in a private placement		1,890
Maximum liquidated damages for each participant for failure to maintain effectiveness of registration statement (as a percent)				5.00%
Private placement | Ordinary shares and warrants to purchase ordinary shares | Board members
SHAREHOLDERS' EQUITY
Proceeds from exercise of warrants into Ordinary Shares		$ 2,999
Number of board members invested | director		1
Private placement | Ordinary shares and warrants to purchase ordinary shares | First tranche
SHAREHOLDERS' EQUITY
Exercise price of units (in dollars per unit) | $ / shares											3.255
Proceeds from exercise of warrants into Ordinary Shares			$ 21,333
Number of board members invested | director			2
Private placement | Ordinary shares and warrants to purchase ordinary shares | First tranche | Board members
SHAREHOLDERS' EQUITY
Proceeds from exercise of warrants into Ordinary Shares			$ 5,133
Private placement | Ordinary Shares
SHAREHOLDERS' EQUITY
Value of shares and warrants to which the company agreed to issue and sell									$ 30,000		$ 32,000
Ordinary Shares, shares authorized | shares									5,031,550
Ordinary share, nominal value (in dollars per share) | ₪ / shares								₪ 0.01
Price per share | $ / shares									$ 5.90
Issuance costs, upon issuance of Ordinary shares in a private placement	$ 1,748
Private placement | Ordinary Shares | First tranche
SHAREHOLDERS' EQUITY
Ordinary Shares, shares authorized | shares											6,554,016
Ordinary share, nominal value (in dollars per share) | ₪ / shares				₪ 0.01
Private placement | Ordinary Shares | Second tranche
SHAREHOLDERS' EQUITY
Value of shares and warrants to which the company agreed to issue and sell											$ 10,700
Period over which closing price is used to determine issuance price of share in a subscription agreement				30 days
Private placement | Ordinary Shares | Second tranche | Minimum
SHAREHOLDERS' EQUITY
Price per share | $ / shares											$ 3.13
Private placement | Warrant to purchase Ordinary Shares
SHAREHOLDERS' EQUITY
Warrants authorized (in warrants) | shares									2,515,775
Exercise price of units (in dollars per unit) | $ / shares									0.125
Exercise price of warrants (in dollars per share) | $ / shares									$ 6.785		$ 3.5995
Private placement | Warrant to purchase Ordinary Shares | First tranche
SHAREHOLDERS' EQUITY
Warrants authorized (in warrants) | shares											6,554,016